I installed git for windows and it works fine(e.g. use one of the following solutions Want to download a Git repository, what do I need (windows machine)?).
I tried
There is no native repo for Windows currently.
You may use a Linux virtual machine or dual-boot, or work around the (relatively minor) issues caused by symlinks not functioning on your filesystem.
Another option would be to just use git directly instead of using the repo as a convenience wrapper - repo is a support tool, and doesn't add any substantial power.