Yes. "Refresh force" simply means that the materialized view will do a fast refresh, if it can. If it can't, then it will do a complete refresh. There is no syntax involved.
If you definitely must do a fast refresh, then don't specify "refresh force". Use "refresh fast" instead. That's what we use on our biggest materialized views. A complete refresh would take too long, so it's better for a fast refresh to fail than to attempt a complete refresh.