Put some masking tape on it. I've seen worse booboos survive.
If you're worried about the tape, take a drinking straw, and cut off an inch or so. Split the inch-size straw down the side. Slide it over your wounded plant and THEN tape. Not my original idea, but it works.
@ OP i heard of an old timer tying broken branches with hemp or cotton twine and filling in any open wounds with beeswax, i bet unscented parrafin would work too.
@ phases GG #4 supposedly got the name because of how sticky and strong it can be. reportedly gumming up scissors bad enough to wreck them. I was talking with my friend just earlier about it. i posed the theory that maybe due to its color it would be named silverback or something but was suggested GG because of the famous super sticky and awesome heavy duty tape.
i dont know about all that but i saw some last weekend and it was the real deal. never saw pot in a bag that looked like it. ever. super green/grey/silver/white. beautiful smoke. one person hanging out refused to believe it was weed! ha