$ git clone -n https://src.fedoraproject.org/rpms/ghc-pem.git /var/lib/mock/f31-build-54713-28041/root/chroot_tmpdir/scmroot/ghc-pem
Cloning into '/var/lib/mock/f31-build-54713-28041/root/chroot_tmpdir/scmroot/ghc-pem'...
$ git reset --hard 29e09d864fb2361236684e5332f77bd9de825014
HEAD is now at 29e09d8 refresh to cabal-rpm-0.13