1). Fork repository https://github.com/qaprosoft/carina to your own user.
2). Clone your fork to your local machine:
git clone [email protected]:your_fork_url/carina.git
3). git remote add origin <your_fork_url> (can be already added)
4). git fetch origin
5). git remote add upstream [email protected]:qaprosoft/carina.git
6). git fetch upstream
7). git checkout -b work_local_branch upstream/master
And then after adding files (git add ...) use git commit (add description) and thenpush:
git push origin work_local_branch:work_remote_branch
And on https://github.com/qaprosoft/carina you will see possibility to "Compare & Pull Request"