If I were to cast [mtg:Hijack] on one of my opponent's creatures then, while that creature is under my control for the turn, I cast [mtg:Blood Divination] choosing to sacrifice the creature I took from him/her, does that creature go into my graveyard (since I control the permanent), or does it go into my opponent's graveyard? 

This happened recently while playing with friends and we just decided to put it in the original owner's graveyard.