$ git clone -n https://src.fedoraproject.org/rpms/R-quantities.git /var/lib/mock/f40-build-789202-135678/root/chroot_tmpdir/scmroot/R-quantities
Cloning into '/var/lib/mock/f40-build-789202-135678/root/chroot_tmpdir/scmroot/R-quantities'...
$ git fetch origin 7c22f81f6fc3cbffd6e8c78a7b80a9e9f5b8af29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-quantities
 * [new ref]         7c22f81f6fc3cbffd6e8c78a7b80a9e9f5b8af29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c22f81 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild