$ git clone -n https://src.fedoraproject.org/rpms/libglibutil.git /var/lib/mock/f40-build-784659-133496/root/chroot_tmpdir/scmroot/libglibutil
Cloning into '/var/lib/mock/f40-build-784659-133496/root/chroot_tmpdir/scmroot/libglibutil'...
$ git fetch origin b1501dd204a7113660c954ff72f2569fcd4aa908:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libglibutil
 * [new ref]         b1501dd204a7113660c954ff72f2569fcd4aa908 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1501dd 1.0.76