How to autoload submodules in github?

Question

git

How to make sure that when downloading a repository from github, all its dependencies are downloaded? Those. all submodules?
I added git submodule add ... vendor/example, made a commit, pushed it to github, everything is ok there, but when downloading the folder vendor/exampleis empty, why is that?
PS git clone...+ git submodule update --initis ok too

Answer 1

git clone --recursive