Docs: Handling Integrity Problems Found by Check Rake Tasks

New doc or update?

• New documentation
• Update existing documentation

Checklists

After getting a repository with a failed automatica check, we are getting dangling commit messages when running git fsck from here: https://docs.gitlab.com/ee/administration/raketasks/check.html

However, we cannot locate information on how / whether to run commands to fix the situation.

We wonder:

• do we have to use rake tasks for all git operations on the Gitlab file store, or can we do commands right on the underlying file system?
• if commands can run on the file system, do they have to sudo to "git" like the rake task examples?
• are all the normal git commands for fixing the repository available as rake commands?

Dangling commits do NOT exist on a cloned copy - so it would appear we have to fix it directly on the Gitlab file store.