$ git clone -n https://src.fedoraproject.org/rpms/kf6-attica.git /var/lib/mock/f40-build-787665-134881/root/chroot_tmpdir/scmroot/kf6-attica
Cloning into '/var/lib/mock/f40-build-787665-134881/root/chroot_tmpdir/scmroot/kf6-attica'...
$ git fetch origin 13aa1b0c25539affbd13427e9b080badd9789d6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-attica
 * [new ref]         13aa1b0c25539affbd13427e9b080badd9789d6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13aa1b0 6.0.0