In the movie Julius Caesar:His time has come,Sulla is willing to spare Caesar's life if he will do what?

If this is the same movie that stars Jeremy Sisto as JC, I never got to watch more than the first half hour, but in the actual history of Caesar, Sulla ordered him to divorce his wife, Cornelia, because she was the daughter of Cinna, one of Sulla's enemies. Caesar refused and consequently left Rome to go and study oratory at Rhodes.