Term for Forking Because of a Schism?

There's a term on the tip of my tongue and I am hoping you all can help me out.

On GitHub, or with any open-source software project more generally, when one group of developers forks a project because they are unhappy with its direction, it is sometimes times informally called… what? The term is generally used to describe the act of creating a new project from an existing one, due to dissatisfaction with the original project's direction. I think it fits the pattern *forking, but I'm not positive.