'How to make a repo and include few other repo in it?

I am not very good at describing but I will give my best.

I am trying to work on a open source game, however it's dependencies are in few other repositories.

I want to actually create my own repo and include everything in it. What will be the best way to do it?

I have seen several other questions like this but I couldn't figure out from those.

git repository

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source