You can clone with
HTTPS or Subversion.
(I've just been reading about Templify, and have not tried it yet)
I started working with an open source project where plugins are created as Projects and added to the Solution. I want to templify a plugin Project.
Does Templify have to have an entire Solution, or can it templify just a Project?
It can templify any arbitary folder structure - so that can be a solution, project or just a random folder structure.