I have the same problem in the greenhouse..they got to tall and I tried bending them some split a few..I made a mix of superthrive ..sprayed the wound and tied back together..and no problems..they healed back...just have to be careful is all..I am like a bull in a china shop in the greenhouse...always tying stuff up and breaking branches..LOL...
But just pull the together and hope for the best..they should heal since you caught it fast and not had a chance to dry out at the break...
Al