$ git clone -n https://src.fedoraproject.org/rpms/clatd.git /var/lib/mock/f42-build-3273920-41313/root/chroot_tmpdir/scmroot/clatd
Cloning into '/var/lib/mock/f42-build-3273920-41313/root/chroot_tmpdir/scmroot/clatd'...
$ git fetch origin 5963be7e8f81b1b9805763b8039240af7f73dc3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clatd
 * [new ref]         5963be7e8f81b1b9805763b8039240af7f73dc3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5963be7 Unified sbin/bin from f42