$ git clone -n https://src.fedoraproject.org/rpms/ghc-x509-system.git /var/lib/mock/f31-build-55065-28083/root/chroot_tmpdir/scmroot/ghc-x509-system
Cloning into '/var/lib/mock/f31-build-55065-28083/root/chroot_tmpdir/scmroot/ghc-x509-system'...
$ git reset --hard 6800b40ea9d5d135e8c8a03fafde81d2614eeaf4
HEAD is now at 6800b40 refresh to cabal-rpm-0.13