$ git clone -n https://src.fedoraproject.org/rpms/R-gdtools.git /var/lib/mock/f40-build-737720-107332/root/chroot_tmpdir/scmroot/R-gdtools
Cloning into '/var/lib/mock/f40-build-737720-107332/root/chroot_tmpdir/scmroot/R-gdtools'...
$ git fetch origin a78524c88a57c799d56e1f99229bc48bf9c733b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gdtools
 * [new ref]         a78524c88a57c799d56e1f99229bc48bf9c733b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a78524c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild