In [ ]:
cd aiida-phonopy-fyw
git checkout -b development #switch to the development
git remote add upstream https://github.com/abelcarreras/aiida-phonopy.git # add Abel's repo as upstream
git fetch upstream # fetch the upstream, pull in the latest changes from upstream
git push origin upstream/development:development # push tracking branch upsteram/development to origin/development
#ref: Git merge upstream branch, stackoverflow 38583600