$ git clone -n https://src.fedoraproject.org/rpms/ghc-libffi.git /var/lib/mock/f31-build-94248-32474/root/chroot_tmpdir/scmroot/ghc-libffi
Cloning into '/var/lib/mock/f31-build-94248-32474/root/chroot_tmpdir/scmroot/ghc-libffi'...
$ git reset --hard eea37b65da1d913a44f9693743dda7504087369e
HEAD is now at eea37b6 BR prof for lib and static for executable