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