Install a github repository as a library through a script file

I am trying to remove the libraries folder in an Arduino project I am working on and install them through a script file. The issue with some of the libraries is that they seem to not be officially registered, so you can't use the arduino-cli lib install for them. Most of them are on github, so I am looking for a way to install them in a similar fashion as arduino-cli lib install, so they can all be neatly in one script file. I am slightly new to github and I am not sure if there is a way through which this is achievable.