$ git clone -n https://src.fedoraproject.org/rpms/R-udunits2.git /var/lib/mock/f31-build-50872-27445/root/chroot_tmpdir/scmroot/R-udunits2
Cloning into '/var/lib/mock/f31-build-50872-27445/root/chroot_tmpdir/scmroot/R-udunits2'...
$ git reset --hard 3a6100fbbeb95c1921cfece9cfb165f29e1a0cd0
HEAD is now at 3a6100f Initial import (#1687624).