$ git clone -n https://src.fedoraproject.org/rpms/ghc-torrent.git /var/lib/mock/f31-build-55015-28078/root/chroot_tmpdir/scmroot/ghc-torrent
Cloning into '/var/lib/mock/f31-build-55015-28078/root/chroot_tmpdir/scmroot/ghc-torrent'...
$ git reset --hard cf9e9134cb8cc000c4454ab8c35c69ab3bfd8e02
HEAD is now at cf9e913 refresh to cabal-rpm-0.13