$ git clone -n https://src.fedoraproject.org/rpms/ghc-system-fileio.git /var/lib/mock/f31-build-54848-28065/root/chroot_tmpdir/scmroot/ghc-system-fileio
Cloning into '/var/lib/mock/f31-build-54848-28065/root/chroot_tmpdir/scmroot/ghc-system-fileio'...
$ git reset --hard 304332e61245e6303d69b7e9d769dd59111efd06
HEAD is now at 304332e update to 0.3.16.4