$ git clone -n https://src.fedoraproject.org/rpms/g3kb-switch.git /var/lib/mock/f40-build-2285774-55690/root/chroot_tmpdir/scmroot/g3kb-switch
Cloning into '/var/lib/mock/f40-build-2285774-55690/root/chroot_tmpdir/scmroot/g3kb-switch'...
$ git fetch origin 20bee81cdbb06bf39a415136d95d083824b70374:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g3kb-switch
 * [new ref]         20bee81cdbb06bf39a415136d95d083824b70374 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20bee81 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild