The Git program can store both, and you can explain to it that differences in the Markdown file correspond to the differences in the document file. Pandoc is a tool worth knowing about anyway.

The git program is incredibly self-aware, so its auto-complete options effectively provide an alternative interface. You can start by exploring all of git’s subcommands by typing git followed by ...

First you'll need about 2GB of spare disk space, and you'll need to install the "git" program (and cygwin if you're running Windows), use git to download the source, and then rearrange the source ...