Clone your personal repository from the command line. You can also copy the command directly from your empty repository. Look under Working with your repository. From a terminal window, run these commands
1.For cloning the files
git clone https://github.com/unaissait/GameChat.git
2.To Work in the Clone
cd GameChat
3.For Merging the modification from local clone folder in your pc to master in github
git init
git add --all
git commit -m "Initial Commit"
git remote add origin https://github.com/unaissait/GameChat.git
git push -u origin master
4.For getting the updates from master in github(should be done before step 3 if it is not the first time)
git pull origin master