$ git clone -n https://src.fedoraproject.org/rpms/perl-Tie-RefHash.git /var/lib/mock/f41-build-815699-149688/root/chroot_tmpdir/scmroot/perl-Tie-RefHash
Cloning into '/var/lib/mock/f41-build-815699-149688/root/chroot_tmpdir/scmroot/perl-Tie-RefHash'...
$ git fetch origin a7fb6d1f748ee4f320207c08dc012c1326dba85a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tie-RefHash
 * [new ref]         a7fb6d1f748ee4f320207c08dc012c1326dba85a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7fb6d1 Increase release to favour standalone package