If you are doing a short refeed -- like less than 24 hours, basically, just minimize fat and fructose intake, and eat as many carbs as you want. It doesn't matter where they come from -- that is 80-90% of what you need to know.
The other 10-20% is really too long and complicated to fully explain here -- some of it can be figured out from my previous articles, the rest will be addressed in the upcoming installments.