$ git clone -n https://src.fedoraproject.org/rpms/ghc-generic-deriving.git /var/lib/mock/f31-build-54365-27993/root/chroot_tmpdir/scmroot/ghc-generic-deriving
Cloning into '/var/lib/mock/f31-build-54365-27993/root/chroot_tmpdir/scmroot/ghc-generic-deriving'...
$ git reset --hard 0fbf7484d7f61bbd933ad5a2a77505f445ad73e0
HEAD is now at 0fbf748 refresh to cabal-rpm-0.13