git pull
In github, to sync latest code.
$ git pull
Create a bew dev branch based on master.
$ git checkout -b development
$ git push origin development
https://stackoverflow.com/questions/39478482/how-to-create-development-branch-from-master-on-github
How to push your change to one branch?
git add .
git commit -a -m "test"
git commit --amend
git push origin target-branch