Most Wolves will try to run away from the Pit Bull if it decides to try and attack the Wolf.
However if the Wolf does need to get into a fight with the Pit Bull because the Pit Bull starts the fight then the Wolf would win the fight.
Wolves live out in the wild mostly and are pretty darn strong fighters and a wolf will almost always win the fight when fighting with a Pit Bull or other dog.
So if you have a Pit Bull dog or any other dogs you need to keep them away from Wild Wolves because the Wolf will likely win the fight and injure or kill your dog.