git push from client is not updating files on server

My main objective is to create a central public Git server. I had followed the instructions in the URL below to make it public.

http://book.git-scm.com/4_setting_up_a_public_repository.html

the central public Git server using the command below.

git clone http://<hostname_of_central_public_git_server>/<Project_name>.git

My push seems to be successful too using the command below as I get the message "Everything up-to-date".

git push

However, when I log into the central public Git server and look at the files in the project, none of them have change. I can only see the changes from the client via Gitweb.

Help.

Regards, j