$ git clone -n https://src.fedoraproject.org/rpms/ghc-libffi.git /var/lib/mock/f31-build-54584-28016/root/chroot_tmpdir/scmroot/ghc-libffi
Cloning into '/var/lib/mock/f31-build-54584-28016/root/chroot_tmpdir/scmroot/ghc-libffi'...
$ git reset --hard d9a6e4a4cbc495acc3b74a8cf070be33f71d88d8
HEAD is now at d9a6e4a refresh to cabal-rpm-0.13