How to clone one repository into another?

Question

GitHub

Just got started with GitHub, using GitHub Desktop
I have a repository, let's call it repository "A", which has certain files, which I use as a library, and then I created a separate repository, let's call it repository "B", in which I want to create a mini project and use the developments from "A", and it's unclear if I can clone "A" into "B", and so that when updating "A" the files automatically change to "B", I hope it's clear

Answer 1

Google git submodules