$ git clone -n https://src.fedoraproject.org/rpms/bfs.git /var/lib/mock/f40-build-2282953-55569/root/chroot_tmpdir/scmroot/bfs
Cloning into '/var/lib/mock/f40-build-2282953-55569/root/chroot_tmpdir/scmroot/bfs'...
$ git fetch origin 0607f9ea696835b17ab6f0c6ccd9992d4d5804eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bfs
 * [new ref]         0607f9ea696835b17ab6f0c6ccd9992d4d5804eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0607f9e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild