How to restrict developer access in a git project?

Question

git

There is a project on the git (your own gitlab server), the task is to give access to one of the project folders.
In more detail, it is necessary to give the frontender access only to the frontend folder.
Those. so that when downloading the repository from the server, a person receives only his own folder in which he can do anything, and when pushing, the changes are applied accordingly only inside this folder.
I heard about git submodules, but I didn’t understand what it is and how to work with it .... more precisely, I didn’t understand whether it is possible to make changes to the submodule folder in such a way that it would be automatically updated in its repository, and when other folders in the project are updated the update went to the main repository... Are there similar options?

Answer 1

None
Define code in different repositories

Answer 2

Only create different modules, but not different folders.
git maintains the history of the entire project, not a single folder. With git, you can move a file from folder to folder, which is easy to work with.
gitolite allows you to create modules that will look like top-level folders, but they will be different repositories