[Git] Git submodule basic commands

• Clone a repo tree

git clone --recurse-submodules remote_url

• Link a submodule

git submodule add submodule_remote_url local_linking_path
# Then commit & push to the main repo

• Pull from a submodule

# Pull from specific branch
git pull --recurse-submodules my-branch
# Then commit & push to the main repo

• Update a submodule

cd submodule_path
# Do the commits and push normally, the changes will be pushed to submodule repo

cd main
# Then do a commit and push to the main module

• Reset submodule head to currently stored reference

git submodule update --init