Repository Hooks commit callbacks don't receive commits that are only reachable from annotated tags

Plugins can register PreRepositoryHook and PostRepositoryHook modules to respond to changes to refs. These modules in turn can register a RepositoryHookCommitCallback to receive information about what commits are being added or removed from the updated branch and tags.

There is an issue in the detection of which commit is added/removed to annotated tags.

When pushing an annotated tag, the registered RepositoryHookCommitCallback callbacks do no receive callbacks for commits added or removed to that annotated tag. Lightweight tags and branches are not affected.