$ git clone -n https://src.fedoraproject.org/rpms/kirc.git /var/lib/mock/f40-build-2691550-68142/root/chroot_tmpdir/scmroot/kirc
Cloning into '/var/lib/mock/f40-build-2691550-68142/root/chroot_tmpdir/scmroot/kirc'...
$ git fetch origin b05bfa1a4eca4677e7e4472a04b8c4297a9ce7ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kirc
 * [new ref]         b05bfa1a4eca4677e7e4472a04b8c4297a9ce7ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b05bfa1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild