This is a follow-up to https://gitlab.com/gitlab-org/gitlab/-/issues/346384+. Related, we have https://gitlab.com/gitlab-org/gitlab/-/issues/18633+ to add a way to restore deleted branches through the UI. ### Problem When a source or target branch goes missing/is deleted we show this message in the MR:  It would be great if we helped users “restore” the branch. We only mention that option, but no further explanation is given on “how to restore missing/deleted branches”. Some of the top search results: 1. https://stackoverflow.com/questions/69761824/can-a-deleted-gitlab-branch-be-restored 1. https://forum.gitlab.com/t/accidentally-deleted-branch-how-to-restore/37386 1. https://riptutorial.com/git/example/2446/recover-a-deleted-branch Also, we should not encourage users to merge manually via CLI. ### Proposal 1. Add instructions in the documentation on how to restore a missing/deleted branch. 1. Update that message to point to the new documentation.