$ git clone -n https://src.fedoraproject.org/rpms/perl-B-Hooks-OP-Annotation.git /var/lib/mock/f45-build-21841-588/root/chroot_tmpdir/scmroot/perl-B-Hooks-OP-Annotation
Cloning into '/var/lib/mock/f45-build-21841-588/root/chroot_tmpdir/scmroot/perl-B-Hooks-OP-Annotation'...
$ git fetch origin aacfa89dd4d1206aca69bbe9400de71230d6db07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-B-Hooks-OP-Annotation
 * [new ref]         aacfa89dd4d1206aca69bbe9400de71230d6db07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aacfa89 Perl 5.44 rebuild