$ git clone -n https://src.fedoraproject.org/rpms/kf6-attica.git /var/lib/mock/f42-build-side-1-3506353-45996/root/chroot_tmpdir/scmroot/kf6-attica
Cloning into '/var/lib/mock/f42-build-side-1-3506353-45996/root/chroot_tmpdir/scmroot/kf6-attica'...
$ git fetch origin f2acf927053b6564ce82897c2aea3deed373ac3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-attica
 * [new ref]         f2acf927053b6564ce82897c2aea3deed373ac3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2acf92 6.13.0