Git sparse checkout a folder from specific branch

sparse.md

The goal

Checkout the llvm folder from the release/11.x branch in https://github.com/llvm/llvm-project

My process

git init llvm-project
cd llvm-project
git remote add origin https://github.com/llvm/llvm-project
git fetch --depth=1
git config core.sparseCheckout true
echo llvm >> .git/info/sparse-checkout
git checkout release/11.x