How to move a project from one repository to another while keeping the commit history?

Question

git

Hello!
There is a repository on github: a folder with three projects inside:
-rep
--project1
--project2
--project3
Each project has its own commit history. I want to transfer projects each to my own rep with saving this history, but I don’t really understand how to do it. Tell me, please, how to do this.
Thank you.

Answer 1

git subtree will help.
first link from google