You don't need internet, you can create the main repo somewhere else on your pc (preferably on a second disk to have very minimal backup) and you use file url t

You don't need internet, you can create the main repo somewhere else on your pc (preferably on a second disk to have very minimal backup) and you use file url to access it "file:///F:/MyRepositoriesAreHere/MyProject-repo/ProjectName/trunk"