Fetch Ponyfill is a utility that provides a WHATWG fetch implementation for environments where it may not be natively available, such as older browsers or Node.js. It wraps the GitHub fetch polyfill in a CommonJS module, allowing developers to use fetch without modifying the global window object, and delegates to node-fetch when used in Node.js. This project is ideal for developers working with browserify or webpack who need a consistent fetch API across different environments.