$ git clone -n https://src.fedoraproject.org/rpms/kf6-kio.git /var/lib/mock/f40-build-787140-134734/root/chroot_tmpdir/scmroot/kf6-kio
Cloning into '/var/lib/mock/f40-build-787140-134734/root/chroot_tmpdir/scmroot/kf6-kio'...
$ git fetch origin a3bc1582040b2fceb66ad32449811c468f9d2aab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kio
 * [new ref]         a3bc1582040b2fceb66ad32449811c468f9d2aab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3bc158 6.0.0