error message:
fatal: remote error: Invalid username/password
You may need to use your generated googlecode.com password; see https://code.google.com/hosting/settings

edit git config of project
./git/config

Change to:
https://username:password@code.google.com/p/project-name

Tip: this password is google genertaed, not your google account.

Reference Resource:
http://my.opera.com/freewinger/blog/2012/03/27/googlecode-git-googlecode-git-push-password-error-fix