Tested in Linux Mint!
Just create a .fonts folder in your home directory (if it doesn't exist) and unpack/copy them there.
Clone into /home/username:
$ sudo apt install git
$ git clone https://github.com/msaulohenrique/codegenerator.git /home/username
Change "username" to your username on the machine.
It's also a good idea to manually rebuild the font cache, so you can immediately use the fonts everywhere:
$ fc-cache -f -v