$ git clone -n https://src.fedoraproject.org/rpms/R-ps.git /var/lib/mock/f33-build-130519-40880/root/chroot_tmpdir/scmroot/R-ps
Cloning into '/var/lib/mock/f33-build-130519-40880/root/chroot_tmpdir/scmroot/R-ps'...
$ git reset --hard d075b2b4d145ab3985670794f2c4e923cfe566b4
HEAD is now at d075b2b Merge branch 'f30'