That was only a very rough version. His original plan was to use it as a backend for other VCS. Torvalds handed over the maintainership of the project to Junio Hamano after about 4 months. Much of what we know today as git are contributions from him and others.
None of this is to say that Torvalds didn't invent it. He invented the content addressed object storage format. But it's important to understand the actual history of git's evolution.