$ git clone -n https://src.fedoraproject.org/rpms/kf6-prison.git /var/lib/mock/f40-build-2296659-56407/root/chroot_tmpdir/scmroot/kf6-prison
Cloning into '/var/lib/mock/f40-build-2296659-56407/root/chroot_tmpdir/scmroot/kf6-prison'...
$ git fetch origin 6d63513d6027aa3d280d1608e23c1ca462423397:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-prison
 * [new ref]         6d63513d6027aa3d280d1608e23c1ca462423397 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d63513 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild