$ git clone -n https://src.fedoraproject.org/rpms/R-gplots.git /var/lib/mock/f45-build-6153-346/root/chroot_tmpdir/scmroot/R-gplots
Cloning into '/var/lib/mock/f45-build-6153-346/root/chroot_tmpdir/scmroot/R-gplots'...
$ git fetch origin 6f2b83ced8eb0e500747ee9a609ab3f18c718fd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gplots
 * [new ref]         6f2b83ced8eb0e500747ee9a609ab3f18c718fd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f2b83c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild