You can clone with
HTTPS or Subversion.
When you have joined a game, you're stuck to it in the Game Info window. You can not see other Game Info windows of other games.
In my opinion it would be useful to be able to continue to check other game info windows while having joined one game because maybe another one more interesting (if you prefer its blind or time settings) for you could appear. But you can not know it because you can only see this game exists in the game list but you can not check its features and options.