# download and extract the currently installed version
wget http://wordpress.org/wordpress-2.6.tar.gz
tar xzvf wordpress-2.6.tar.gz
cd wordpress

# initiate git repository
git-init

# add all the wordpress files
git-add .

# check status of repository
git-status

# commit these files
git-commit -m'check in initial 2.6.0 upstream'

# see a graphical picture of your repository
gitk --all