$ git clone -n https://src.fedoraproject.org/rpms/ghc-erf.git /var/lib/mock/f31-build-54305-27988/root/chroot_tmpdir/scmroot/ghc-erf
Cloning into '/var/lib/mock/f31-build-54305-27988/root/chroot_tmpdir/scmroot/ghc-erf'...
$ git reset --hard 92eb543d53069c06d0e16a319f80aa5afe62ec8b
HEAD is now at 92eb543 refresh to cabal-rpm-0.13