.babelrc

{
  "presets": ["./.babelrc.js"],
}

.babelrc.js

const fbjsMM = require('fbjs/module-map')

const myMM = Object.assign({}, fbjsMM, {
  './original': './rewritten',
});

module.exports = {
  "plugins": [
    ["babel-preset-fbjs/plugins/rewrite-modules", {
      map: myMM,
      prefix: '',
    }]
  ],
}

index.js

require('./original');

// fbjs module
const invariant = require('invariant');

invariant(false, 'hello world');

original.js

console.log('original')

rewritten.js

console.log('rewritten')