I do the same; only with vimwiki (so today's diary is just two key strokes away). https://github.com/vimwiki/vimwiki

I recently found a blogpost describing a way to add 'commit hooks' to vimwiki so that my repository is automatically synchronised when I make edits. You can still fall back on command line git for fixing merges / anything else.

http://jarvistmoorefrost.wordpress.com/2014/06/25/snippet-co...