Hearthstone Reconnect Tool allows you to reconnect HS very quickly without closing the game. Just press button "Close connection" before the battle started and the connection between Hearthstone and Blizzard server will be closed. It forces game to reconnect, so you will skip the battle and go directly to Bob's tavern.
Latest release: https://github.com/Vaiz/HsReconnectTool/releases/latest