$ cd ~/annex
	$ cp /tmp/big_file .
	$ cp /tmp/debian.iso .
	$ git annex add .
	add big_file (checksum...) ok
	add debian.iso (checksum...) ok
	$ git commit -a -m added

When you add a file to the annex and commit it, only a symlink to
the content is committed to git. The content itself is stored in
`.git/annex/objects/`