$ git clone -n https://src.fedoraproject.org/rpms/python-hjson.git /var/lib/mock/f45-build-30961-648/root/chroot_tmpdir/scmroot/python-hjson
Cloning into '/var/lib/mock/f45-build-30961-648/root/chroot_tmpdir/scmroot/python-hjson'...
$ git fetch origin aeffd0f581bd6600622bdd4aca62b37512a16b51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-hjson
 * [new ref]         aeffd0f581bd6600622bdd4aca62b37512a16b51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aeffd0f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild