Mock documentation

[Miroslav Suchý]

I started editing:
   https://fedoraproject.org/wiki/Projects/Mock

And I learned about several plugins, but I'm still not sure what some plugins are exactly doing.
If you know that, or you are even the author of that plugin, I would be very glad, if you can spare few minutes and 
enhance the documentation:
   https://fedoraproject.org/wiki/Projects/Mock#Plugins

Thanks