git-mirror is a golang library to periodically mirror (bare clones) remote repositories locally.
The mirror is created with --mirror=fetch hence everything in refs/* on the remote
will be directly mirrored into refs/* in the local repository.
it can also maintain multiple mirrored checked out worktrees on different references.
The implementation borrows heavily from kubernetes/git-sync.
If you want to sync single repository on one reference then you are probably better off
with kubernetes/git-sync, as it provides
a lot more customisation.
git-mirror should be used if multiple mirrored repositories with multiple checked out branches (worktrees) is required.