$ git clone -n https://src.fedoraproject.org/rpms/ghc-gitrev.git /var/lib/mock/f31-build-54421-28001/root/chroot_tmpdir/scmroot/ghc-gitrev
Cloning into '/var/lib/mock/f31-build-54421-28001/root/chroot_tmpdir/scmroot/ghc-gitrev'...
$ git reset --hard 36520dec2611075820e62f21dc1d6cd6b84fe4be
HEAD is now at 36520de refresh to cabal-rpm-0.13