$ git clone -n https://src.fedoraproject.org/rpms/R-pingr.git /var/lib/mock/f45-build-6307-347/root/chroot_tmpdir/scmroot/R-pingr
Cloning into '/var/lib/mock/f45-build-6307-347/root/chroot_tmpdir/scmroot/R-pingr'...
$ git fetch origin a7f5d49968300d9c53ec5ea49df400136c3702ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pingr
 * [new ref]         a7f5d49968300d9c53ec5ea49df400136c3702ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7f5d49 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild