$ git clone -n https://src.fedoraproject.org/rpms/R-RPostgres.git /var/lib/mock/f33-build-621836-67516/root/chroot_tmpdir/scmroot/R-RPostgres
Cloning into '/var/lib/mock/f33-build-621836-67516/root/chroot_tmpdir/scmroot/R-RPostgres'...
$ git reset --hard 91f9b5f9d8da1424bd143dbe0aa8e77d4819f288
HEAD is now at 91f9b5f Update to latest version.