$ git clone -n https://src.fedoraproject.org/rpms/R-unix.git /var/lib/mock/f33-build-630011-67618/root/chroot_tmpdir/scmroot/R-unix
Cloning into '/var/lib/mock/f33-build-630011-67618/root/chroot_tmpdir/scmroot/R-unix'...
$ git reset --hard 4fc7b35efcdf8dece60933ad71e268565ca891f8
HEAD is now at 4fc7b35 Update to latest version.