$ git clone -n https://src.fedoraproject.org/rpms/ccluster.git /var/lib/mock/f45-build-3887-329/root/chroot_tmpdir/scmroot/ccluster
Cloning into '/var/lib/mock/f45-build-3887-329/root/chroot_tmpdir/scmroot/ccluster'...
$ git fetch origin e1023831c35992a9c10a0969e23cee2702e1bd33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ccluster
 * [new ref]         e1023831c35992a9c10a0969e23cee2702e1bd33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e102383 Rebuild for flint 3.6.0