Docs update to highlight push mirror rejection message
Problem to solve
Add detail on why this
! [remote rejected] refs/merge-requests/1/head -> refs/merge-requests/1/head (deny updating a hidden ref)
may be seen from 13.12 when doing a
git push --mirror http://<...>
Further details
Proposal
Update https://docs.gitlab.com/ee/administration/gitaly/#troubleshoot-gitaly to add a section to explain why this message can be seen from 13.12.
! [remote rejected] refs/merge-requests/1/head -> refs/merge-requests/1/head (deny updating a hidden ref)
See git: Reject pushes into internal ref namespaces for more details.
Who can address the issue
GitLab team member.