Steps to creating a Pull Request (PR)

Step 1. Sync your local repository with upstream

Ensure that your local repository is up-to-date with the changes in upstream.

Sync your branch with upstream git fetch upstream master
Pick commits from upstream git rebase -i upstream/master. In case you get conficts, resolve the conflicts manually by going to the files having conflicts. Either accept the incoming changes from upstream or keep your local changes.
Add the file git add . In case there was conflicts, do git rebase --continue followed by git add .
Now make a commit with comments git commit - m 'first commit'
Push changes git push origin +feature-1
Check if file was added to feature-1 branch of origin

Step 2. Create a pull request

Go to upstream repository on GitHub web page. Click on Pull Request Tab. Now click on New Pull Request green button on right hand side.

Add a title. Leave a comment describing what is in your PR
Add reviewer. In this case your teammate wil act as your reviewer.

Click on the green button that says Create pull request
Check PR

Check your commits in PR

Check modified files in PR