$ git clone -n https://src.fedoraproject.org/rpms/R-bench.git /var/lib/mock/f40-build-789299-135702/root/chroot_tmpdir/scmroot/R-bench
Cloning into '/var/lib/mock/f40-build-789299-135702/root/chroot_tmpdir/scmroot/R-bench'...
$ git fetch origin 43118e5d99f1691651aca631450ba2b9793b07d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-bench
 * [new ref]         43118e5d99f1691651aca631450ba2b9793b07d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43118e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild