how to push a repo that is already pushed to a different one code example

Example 1: git push existing clone

git config --global user.name "user_id"
git config --global user.email "[email protected]"

Create a new repository

git clone https://gitlab.com/abc.git
cd folder
touch README.md
git add README.md
git commit -m "add README"
git push -u origin master

Push an existing folder

cd existing_folder
git init
git remote add origin https://gitlab.com/abc.git
git add .
git commit -m "Initial commit"
git push -u origin master

Push an existing Git repository

cd existing_repo
git remote rename origin old-origin
git remote add origin https://gitlab.com/abc.git
git push -u origin --all
git push -u origin --tags

Example 2: git push to another repository

Create a new repo at github.
Clone the repo from fedorahosted to your local machine.
git remote rename origin upstream
git remote add origin URL_TO_GITHUB_REPO
git push origin master
Now you can work with it just like any other github repo. 
To pull in patches from upstream, 
simply run git pull upstream master && git push origin master.