$ git clone -n https://src.fedoraproject.org/rpms/R-data.table.git /var/lib/mock/f40-build-800390-143002/root/chroot_tmpdir/scmroot/R-data.table
Cloning into '/var/lib/mock/f40-build-800390-143002/root/chroot_tmpdir/scmroot/R-data.table'...
$ git fetch origin 7638d2ea3cf619e5b1a2380bb3ee02cb38fbe096:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-data.table
 * [new ref]         7638d2ea3cf619e5b1a2380bb3ee02cb38fbe096 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7638d2e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild