$ git clone -n https://src.fedoraproject.org/rpms/R-S4Vectors.git /var/lib/mock/f40-build-2679128-67927/root/chroot_tmpdir/scmroot/R-S4Vectors
Cloning into '/var/lib/mock/f40-build-2679128-67927/root/chroot_tmpdir/scmroot/R-S4Vectors'...
$ git fetch origin c4c650136e0ab6275250b8cdc56f6fab177baaba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-S4Vectors
 * [new ref]         c4c650136e0ab6275250b8cdc56f6fab177baaba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4c6501 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild