git spare-checkout clone subdirectory

git.sh

# create a directory for the project repo
mkdir [project_name] && cd [project_name]

# initialize git repo
git init

# enable git subtree checkout
git config core.sparsecheckout true

# enter a folder name which is checked out
echo '[folder_name]' >> .git/info/sparse-checkout

# set and fetch the git repository 
git remote add -f origin [git_repo_url]

# pull out the files
git pull origin [branch_name]