Early spring is the best time to do the pruning or in the fall after the first frost. In a case of figs gone wild, I would dig out the offending rooted trees and sell them. This way you cut back on what you have and give the blessing of figs to others in your area. Craigslist is a great place to get them gone. Usually figs don't ge that big. This one is obviously blessed. Enjoy the fruit of your ancestors labors.