contains the tag object while a C<refname^{}> entry gives the tagged objects.
C<REPOSITORY> has the same meaning as the appropriate C<git-ls-remote>
-argument; either an URL or a remote name (if called on a repository instance).
+argument; either a URL or a remote name (if called on a repository instance).
C<GROUPS> is an optional arrayref that can contain 'tags' to return all the
tags and/or 'heads' to return all the heads. C<REFGLOB> is an optional array
of strings containing a shell-like glob to further limit the refs returned in