I do almost the same.
My setup is with Dropbox, though. I have a symbolic link named `/Projects/Foo/_misc` ( the root directory of the git repository ) pointing to `/Dropbox/Projects/Foo`. The link is excluded via .gitignore . Then I use the extra _misc directory for everything related to this project, like notes, assets, experiments that I run, etc.
With dropbox I can be sure that I have all the information on my laptop as well as on my work computer.