$ git clone -n https://src.fedoraproject.org/rpms/ghc-vector-builder.git /var/lib/mock/f31-build-55043-28083/root/chroot_tmpdir/scmroot/ghc-vector-builder
Cloning into '/var/lib/mock/f31-build-55043-28083/root/chroot_tmpdir/scmroot/ghc-vector-builder'...
$ git reset --hard df61f40c8abb885cbfb40397c79b010c9088090f
HEAD is now at df61f40 update to 0.3.6