Create GitHub repo
https://github.com/toyowata/test_00
Create local repo
$ git init test_00
$ cd test_00
Fetch remote repo
$ git remote add upstream [email protected]:armmbed/mbed-os.git
$ git fetch upstream
Merge to local repo
$ git merge upstream/master
$ ls
Create remote repo and push
$ git remote add test_00 https://github.com/toyowata/test_00
$ git push --set-upstream test_00 master
Create branch and push commit
$ git checkout -b branch_01
$ git push --set-upstream test_00 branch_01