$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdesu.git /var/lib/mock/f45-build-15036-466/root/chroot_tmpdir/scmroot/kf6-kdesu
Cloning into '/var/lib/mock/f45-build-15036-466/root/chroot_tmpdir/scmroot/kf6-kdesu'...
$ git fetch origin 578a2b15fdc7ec92d341b81b5f5fe0aa8c552434:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdesu
 * [new ref]         578a2b15fdc7ec92d341b81b5f5fe0aa8c552434 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 578a2b1 6.31.0