$ git clone -n https://src.fedoraproject.org/rpms/boxes.git /var/lib/mock/f40-build-2274776-55029/root/chroot_tmpdir/scmroot/boxes
Cloning into '/var/lib/mock/f40-build-2274776-55029/root/chroot_tmpdir/scmroot/boxes'...
$ git fetch origin 7d0bc7aa9d1385e8041973e8ba959f90f8aac3e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/boxes
 * [new ref]         7d0bc7aa9d1385e8041973e8ba959f90f8aac3e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d0bc7a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild