Using rsync via the Windows Subsystem for Linux to backup a Windows computer

From the world of “why would anyone ever bother to do this?” comes a new approach to backing up your favourite Windows 10 computer! OK so why am I even doing this? I guess the answer to that question is really “just to see if I could.” It’s not the best answer but not everything needs a practical reason right? So how does one go about using the awesome rsync utility to perform a Windows backup?