GitlabRunner does not check out the latest commit but the previous one
### Summary
CI via `gitlab-runner` does not check out the latest commit on the docker image, but uses the previous commit. This is wrong!
### Steps to reproduce
I was able to reproduce this multiple times in our self-hosted GitLab CE instance.
Every time I committed the CI process used the previous instead of the current commit.
### What is the current *bug* behavior?

Look at the commit id of the job on the right (this is the ID I would expect the CI job to use).
Then look at the gitlab runner log. It shows a differnt ID in "HEAD is now at..." message. It's the previous commit id.
### What is the expected *correct* behavior?
I would expect gitlab-runner to use the latest commit.
### Relevant logs and/or screenshots
see above.
This is the CI template:
```
variables:
# This will supress any download for dependencies and plugins or upload messages which would clutter the console log.
# `showDateTime` will show the passed time in milliseconds. You need to specify `--batch-mode` to make this work.
MAVEN_OPTS: "-Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
# As of Maven 3.3.0 instead of this you may define these options in `.mvn/maven.config` so the same config is used
# when running from the command line.
# `installAtEnd` and `deployAtEnd` are only effective with recent version of the corresponding plugins.
MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
# fetch submodules
GIT_SUBMODULE_STRATEGY: recursive
# copy settings.xml with our company Artifactory settings to /root/.m2/settings.xml
before_script:
- .gitlab-ci/artifactory-access/copy-settings.sh
# deploy SNAPSHOTS and RELEASE versions automatically to our Artifactory system
deploy:jdk7:
stage: deploy
image: maven:3.3-jdk-7
script:
- 'mvn $MAVEN_CLI_OPTS deploy'
artifacts:
paths:
- target/*.jar
expire_in: 3 weeks
```
### Output of checks
#### Results of GitLab environment info
<details>
<summary>Expand for output related to GitLab environment info</summary>
<pre>
~# sudo gitlab-rake gitlab:env:info
System information
System: Ubuntu 16.04
Current User: git
Using RVM: no
Ruby Version: 2.3.6p384
Gem Version: 2.6.13
Bundler Version:1.13.7
Rake Version: 12.3.0
Redis Version: 3.2.11
Git Version: 2.14.3
Sidekiq Version:5.0.5
Go Version: unknown
GitLab information
Version: 10.5.2
Revision: b951e0d
Directory: /opt/gitlab/embedded/service/gitlab-rails
DB Adapter: postgresql
URL: https://sub.host.tld
HTTP Clone URL: https://sub.host.tld/some-group/some-project.git
SSH Clone URL: git@sub.host.tld:some-group/some-project.git
Using LDAP: no
Using Omniauth: yes
Omniauth Providers: github
GitLab Shell
Version: 6.0.3
Repository storage paths:
- default: /var/opt/gitlab/git-data/repositories
Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks
Git: /opt/gitlab/embedded/bin/git
</pre>
</details>
#### Results of GitLab application Check
<details>
<summary>Expand for output related to the GitLab application check</summary>
<pre>
~# sudo gitlab-rake gitlab:check SANITIZE=true
Checking GitLab Shell ...
GitLab Shell version >= 6.0.3 ? ... OK (6.0.3)
Repo base directory exists?
default... yes
Repo storage directories are symlinks?
default... no
Repo paths owned by git:root, or git:git?
default... yes
Repo paths access is drwxrws---?
default... yes
hooks directories in repos are links: ...
2/3 ... ok
2/4 ... ok
3/6 ... ok
17/7 ... ok
17/8 ... ok
2/9 ... ok
17/10 ... ok
2/11 ... ok
3/12 ... ok
2/13 ... ok
2/14 ... ok
2/15 ... ok
2/16 ... ok
2/17 ... ok
2/18 ... ok
3/19 ... ok
54/20 ... ok
2/21 ... ok
3/22 ... ok
54/25 ... ok
8/26 ... ok
19/27 ... ok
19/28 ... ok
19/29 ... ok
31/30 ... ok
17/31 ... ok
31/32 ... ok
10/33 ... ok
31/34 ... ok
3/35 ... ok
3/36 ... ok
1/37 ... ok
32/38 ... ok
32/39 ... ok
1/40 ... ok
32/41 ... ok
17/42 ... ok
17/43 ... ok
3/44 ... ok
36/46 ... ok
17/48 ... ok
54/51 ... ok
26/52 ... repository is empty
27/57 ... ok
27/58 ... ok
27/60 ... ok
27/61 ... ok
28/63 ... ok
28/64 ... ok
28/66 ... ok
28/69 ... ok
29/70 ... ok
28/72 ... ok
45/73 ... ok
45/74 ... ok
2/75 ... ok
28/76 ... ok
29/77 ... ok
10/78 ... ok
17/79 ... ok
10/80 ... ok
3/81 ... ok
52/82 ... ok
10/83 ... ok
36/84 ... ok
30/85 ... ok
26/86 ... ok
34/90 ... ok
45/91 ... ok
9/92 ... ok
10/95 ... repository is empty
36/96 ... ok
32/97 ... ok
10/98 ... ok
19/99 ... ok
36/100 ... ok
3/101 ... ok
3/102 ... ok
17/103 ... ok
36/106 ... ok
17/110 ... ok
48/111 ... ok
17/112 ... ok
48/114 ... ok
16/115 ... ok
29/116 ... ok
3/117 ... ok
9/118 ... ok
26/119 ... ok
16/120 ... ok
25/121 ... ok
13/122 ... ok
24/123 ... ok
8/124 ... repository is empty
25/126 ... ok
25/127 ... ok
26/128 ... ok
45/129 ... ok
54/130 ... ok
17/131 ... ok
17/132 ... ok
31/133 ... ok
34/135 ... ok
31/137 ... ok
10/138 ... ok
10/139 ... ok
17/140 ... ok
27/141 ... ok
10/142 ... repository is empty
48/143 ... ok
29/144 ... ok
10/145 ... ok
17/146 ... ok
28/148 ... ok
10/149 ... ok
10/150 ... ok
1/151 ... ok
41/152 ... ok
17/153 ... ok
10/155 ... ok
17/156 ... ok
3/157 ... ok
48/158 ... ok
17/160 ... ok
17/161 ... ok
10/162 ... ok
17/163 ... ok
17/164 ... ok
28/165 ... ok
48/166 ... ok
26/167 ... ok
17/168 ... ok
28/169 ... ok
26/171 ... ok
26/172 ... ok
17/173 ... ok
45/174 ... ok
45/175 ... ok
45/176 ... ok
45/177 ... ok
2/179 ... ok
54/180 ... ok
17/181 ... ok
17/182 ... ok
24/183 ... ok
54/185 ... ok
48/186 ... ok
48/187 ... repository is empty
3/188 ... ok
36/189 ... ok
28/190 ... repository is empty
17/191 ... ok
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Redis available via internal API: OK
Access to /var/opt/gitlab/.ssh/authorized_keys: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Sidekiq ...
Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Reply by email is disabled in config/gitlab.yml
Checking LDAP ...
LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
2/3 ... yes
2/4 ... yes
3/6 ... yes
17/7 ... yes
17/8 ... yes
2/9 ... yes
17/10 ... yes
2/11 ... yes
3/12 ... yes
2/13 ... yes
2/14 ... yes
2/15 ... yes
2/16 ... yes
2/17 ... yes
2/18 ... yes
3/19 ... yes
54/20 ... yes
2/21 ... yes
3/22 ... yes
54/25 ... yes
8/26 ... yes
19/27 ... yes
19/28 ... yes
19/29 ... yes
31/30 ... yes
17/31 ... yes
31/32 ... yes
10/33 ... yes
31/34 ... yes
3/35 ... yes
3/36 ... yes
1/37 ... yes
32/38 ... yes
32/39 ... yes
1/40 ... yes
32/41 ... yes
17/42 ... yes
17/43 ... yes
3/44 ... yes
36/46 ... yes
17/48 ... yes
54/51 ... yes
26/52 ... yes
27/57 ... yes
27/58 ... yes
27/60 ... yes
27/61 ... yes
28/63 ... yes
28/64 ... yes
28/66 ... yes
28/69 ... yes
29/70 ... yes
28/72 ... yes
45/73 ... yes
45/74 ... yes
2/75 ... yes
28/76 ... yes
29/77 ... yes
10/78 ... yes
17/79 ... yes
10/80 ... yes
3/81 ... yes
52/82 ... yes
10/83 ... yes
36/84 ... yes
30/85 ... yes
26/86 ... yes
34/90 ... yes
45/91 ... yes
9/92 ... yes
10/95 ... yes
36/96 ... yes
32/97 ... yes
10/98 ... yes
19/99 ... yes
36/100 ... yes
3/101 ... yes
3/102 ... yes
17/103 ... yes
36/106 ... yes
17/110 ... yes
48/111 ... yes
17/112 ... yes
48/114 ... yes
16/115 ... yes
29/116 ... yes
3/117 ... yes
9/118 ... yes
26/119 ... yes
16/120 ... yes
25/121 ... yes
13/122 ... yes
24/123 ... yes
8/124 ... yes
25/126 ... yes
25/127 ... yes
26/128 ... yes
45/129 ... yes
54/130 ... yes
17/131 ... yes
17/132 ... yes
31/133 ... yes
34/135 ... yes
31/137 ... yes
10/138 ... yes
10/139 ... yes
17/140 ... yes
27/141 ... yes
10/142 ... yes
48/143 ... yes
29/144 ... yes
10/145 ... yes
17/146 ... yes
28/148 ... yes
10/149 ... yes
10/150 ... yes
1/151 ... yes
41/152 ... yes
17/153 ... yes
10/155 ... yes
17/156 ... yes
3/157 ... yes
48/158 ... yes
17/160 ... yes
17/161 ... yes
10/162 ... yes
17/163 ... yes
17/164 ... yes
28/165 ... yes
48/166 ... yes
26/167 ... yes
17/168 ... yes
28/169 ... yes
26/171 ... yes
26/172 ... yes
17/173 ... yes
45/174 ... yes
45/175 ... yes
45/176 ... yes
45/177 ... yes
2/179 ... yes
54/180 ... yes
17/181 ... yes
17/182 ... yes
24/183 ... yes
54/185 ... yes
48/186 ... yes
48/187 ... yes
3/188 ... yes
36/189 ... yes
28/190 ... yes
17/191 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.5 ? ... yes (2.3.6)
Git version >= 2.9.5 ? ... yes (2.14.3)
Git user has default SSH configuration? ... yes
Active users: ... 25
Checking GitLab ... Finished
</pre>
</details>
issue