$ git clone -n https://src.fedoraproject.org/rpms/gball.git /var/lib/mock/f40-build-2208056-52110/root/chroot_tmpdir/scmroot/gball
Cloning into '/var/lib/mock/f40-build-2208056-52110/root/chroot_tmpdir/scmroot/gball'...
$ git fetch origin 4135a0978806d7a3e7ea301fc832c0375a673cf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gball
 * [new ref]         4135a0978806d7a3e7ea301fc832c0375a673cf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4135a09 Orphaned for 6+ weeks