Unity cloud build but not in the cloud
I'm sure it might be possible if there's a way to signal a unity3d editor script to automatically build when a commit is made to a repo/branch. So imagine me taking a secondary computer and just dedicating it to holding my repository/doing unity builds. I've heard of people doing stuff like this with jenkins, but there's probably a practical reason why unity cloud build is so popular.
I need more clarification on this.
I'll contact you by email to ask you to add more info.