$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcontacts.git /var/lib/mock/f40-build-2217468-52549/root/chroot_tmpdir/scmroot/kf6-kcontacts
Cloning into '/var/lib/mock/f40-build-2217468-52549/root/chroot_tmpdir/scmroot/kf6-kcontacts'...
$ git fetch origin 5b0745712169c20d41bbd5dffcfe81694ab76a9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcontacts
 * [new ref]         5b0745712169c20d41bbd5dffcfe81694ab76a9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b07457 5.247.0