cd /path/to/my/repo
git remote add jumpstart https://github.com/shfrmn/jumpstart
git fetch jumpstart
# to create a local branch based on a remote one
git checkout -b <branch_name> jumpstart/<branch_name>
# to merge a remote branch right away
git merge jumpstart/<branch_name> --allow-unrelated-histories
git checkout --orphan <branch_name>
git rm -rf *