How to hide directories for some employees in git?

Question

git

Hi all.
How do companies usually solve this problem?
There are three employees who write the code for one program.
How to restrict access to the directory so that the employee does not even know about its existence.
And at the same time when he wrote the code, does his code margin with ours?
*ps The task is to prevent the employee from stealing the entire program code.

Answer 1

How do companies usually solve this problem?

Usually this problem is solved in one of the following ways:
1. The selection of employees who drag nothing
2. The presence of a security specialist (s)
3. Git submodules
4. Different repositories