How to deploy a PHP site from multiple GIT repositories?

Question

PHP

Help me please.
The project is in the transition to open source. The project sources are gradually uploaded to the public GIT repository. But while this code is not so much, the main part is not published and is located on the server in a separate repository that is not accessible from outside.
Is it possible to set up a deployment of two or more repositories at once? How it is better to implement it?

Answer 1

git-submodule - it is necessary to allocate the code to a separate folder, and then transfer it to a new repository, and then shamanize the contents of the new repository instead of that folder. Correctly?
But what if the code is mixed, and part of it is public, the other is not. For example, in the same folder are both public моделиand not yet published?