How to connect a non-empty directory into a git repository

1. Open the Command Prompt (Windows)/Terminal (Linux)
2. Go to folder location
3. Type the following commands:
   
   
   git init
   git add -A .
   git remote add origin {url}
   git fetch
   git pull {url} master
   git commit -m "{message}"
   git push -u origin master

{url} is the location of your bare repository
{message} is any message that you want to identify the commit

Example:

I want to connect the c:\workspace\luizcgjr to the http://github.com/blogger/luizcgjr repository

1. Open the Command Prompt (Windows)
2. Type
cd "c:\workspace\luizcgjr"

git init
git add -A .
git remote add origin http://github.com/blogger/luizcgjr
git fetch
git pull http://github.com/blogger/luizcgjr master
git commit -m "Added luizcgjr project to the repository"
git push -u origin master

Source: http://stackoverflow.com/questions/3311774/how-to-convert-existing-non-empty-directory-into-a-git-working-directory-and-pus