$ git clone -n https://src.fedoraproject.org/rpms/ghc-libffi.git /var/lib/mock/f40-build-742204-110610/root/chroot_tmpdir/scmroot/ghc-libffi
Cloning into '/var/lib/mock/f40-build-742204-110610/root/chroot_tmpdir/scmroot/ghc-libffi'...
$ git reset --hard d8147bd4793ef7136d145e8acbc7ab8a1d0b5d14
HEAD is now at d8147bd bump release