Using fossil
Get fossil and use it to clone this site:
$ fossil clone https://odin.minimaltype.com/index.cgi/ $ cd index/vendor/raylib/002-asteroids/ 002-asteroids$ make
fossil's default behavior has changed a few times over time, but as of this writing it'll create an index.fossil in the working directory and then deposit the files in an index subdir. You can change this: look at fossil help clone.
Fossil's pretty cool. It's most of both the frontend and the backend of this website.
Using git
The examples should also live in jrfondren/odin-examples on GitHub:
$ git clone https://github.com/jrfondren/odin-examples.git $ cd odin-examples/vendor/raylib/002-asteroids/ 002-asteroids$ make