$ git clone -n https://src.fedoraproject.org/rpms/ghc-contravariant.git /var/lib/mock/f31-build-54181-27959/root/chroot_tmpdir/scmroot/ghc-contravariant
Cloning into '/var/lib/mock/f31-build-54181-27959/root/chroot_tmpdir/scmroot/ghc-contravariant'...
$ git reset --hard 11991d62f50e8ef693de80abcee39927d9b14383
HEAD is now at 11991d6 refresh to cabal-rpm-0.13