Stop Git from being my repository

We use Subversion where I work and we're moving to VS 2017 as well. So I stood up 2017 and committed a solution to source control. The problem is that I had forgotten to hook up Subversion (SVN) and so VS used Git instead (I guess that's the default). Anyway, it packed all my code into a couple Git-files and started asking me to make a Git account. I don't really want to make a Git account and although I did manage to find a copy of my code, I'd rather not port all of it over to a new project if I can avoid it. If anyone knows how I can just tell Git to go away and put my solution back the way it found it, I'd really appreciate it.

Thanks in advance.