$ git clone -n https://src.fedoraproject.org/rpms/wl-mirror.git /var/lib/mock/f40-build-804687-144588/root/chroot_tmpdir/scmroot/wl-mirror
Cloning into '/var/lib/mock/f40-build-804687-144588/root/chroot_tmpdir/scmroot/wl-mirror'...
$ git fetch origin b25bccfb787bdd86bf015166b4638b9949b3bbff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wl-mirror
 * [new ref]         b25bccfb787bdd86bf015166b4638b9949b3bbff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b25bccf Update to 0.16.2