Does git duplicate all my files?
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I am trying to implement a new backup system on a website using git. The virtual private server has 20GB space total with 5GB free. 

When I run `git add .` at the `/var/www` (with my favorite `.gitignore` parameters) I have a gigantic git folder that fills my hard drive to capacity. 

It is not immediately apparent as to why this is happening as I expect the `.git` directory to contain the bits about the bits (meta information) and not binary duplicates of all my files!

Whats going on here? If my website is 14GB will the `.git` directory occupy an additional 14 gb?