<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=15417) </details> <!--IssueSummary end--> ## Summary One of our customers has asked that we support the post-update Git hook in GitLab and GitLab-shell ## Additional Detail The customer requires the post-update hook to maintain their current Git workflow that cannot be accomplished by using webhooks Relevant Zendesk ticket: https://gitlab.zendesk.com/agent/tickets/29817 Customer has kindly provided an implementation of the post-update hook and changes necessary to GitlabCustomHook for GitLab-shell Issue also raised against GitLab-shell for this functionality: https://gitlab.com/gitlab-org/gitlab-shell/issues/49 /cc @DouweM @jacobvosmaer-gitlab