During the Australia-France game we saw a penalty shout turned down by the ref, Australia broke but a few seconds later the ball went out for a throw... the ref took this opportunity to check VAR and eventually awarded a penalty.

What happens when a penalty shout is turned down, the opposition break and score, only for the ref to award the original pen? I guess, he would have to go back a disallow the latest goal, which will cause MEYHEM. Or does he take the easy way out and refuse to go back to check it, even if the refs in the room tell him to?