$ git clone -n https://src.fedoraproject.org/rpms/ghc-happstack-server.git /var/lib/mock/f31-build-54428-28001/root/chroot_tmpdir/scmroot/ghc-happstack-server
Cloning into '/var/lib/mock/f31-build-54428-28001/root/chroot_tmpdir/scmroot/ghc-happstack-server'...
$ git reset --hard bdc021d28f7d9add79c514714171f1c56802f086
HEAD is now at bdc021d update to 7.5.1.3