Git operations fails against GitLab omnibus images created from master

Failure in many tests. Probably every test that uses Git. E.g.:

They all show an error like:

3713      QA::Git::Repository::RepositoryCommandError:
3714        The command HOME="/tmp/qa-netrc-credentials/24" git push http://root@gitlab-ee-a4cbee3f.test/gitlab-qa-sandbox-group/qa-test-2019-11-24-19-46-03-c0020822ccf82801/deploy-key-clone-project-a0890d113f53baee.git DEPLOY_KEY_ecdsa_521:DEPLOY_KEY_ecdsa_521 2>&1 failed (1) with the following output:
3715        remote: GitLab: Push operation timed out        
3716        remote: 
3717        remote: Timing information for debugging purposes:        
3718        remote: Running checks for ref: DEPLOY_KEY_ecdsa_521        
3719        remote: Checking if you are allowed to push... (6.24ms)        
3720        remote: Checking if default branch is being deleted... (0.17ms)        
3721        remote: Checking if you are force pushing to a protected branch... (4.35ms)        
3722        remote: Checking if you are allowed to push to the protected branch... (2.58ms)        
3723        remote: Scanning repository for blobs stored in LFS and verifying their files have been uploaded to GitLab... (cancelled after 30001.8ms)        
3724        To http://gitlab-ee-a4cbee3f.test/gitlab-qa-sandbox-group/qa-test-2019-11-24-19-46-03-c0020822ccf82801/deploy-key-clone-project-a0890d113f53baee.git
3725         ! [remote rejected] DEPLOY_KEY_ecdsa_521 -> DEPLOY_KEY_ecdsa_521 (pre-receive hook declined)
3726        error: failed to push some refs to 'http://root@gitlab-ee-a4cbee3f.test/gitlab-qa-sandbox-group/qa-test-2019-11-24-19-46-03-c0020822ccf82801/deploy-key-clone-project-a0890d113f53baee.git'
Edited by Mark Lapierre