gistfile1.js

#! /usr/bin/env node

var execFile = require('child_process').execFileSync;

var filters = [
  function replaceMasterWithMaester(word) {
    if(word === "maester") {
      return "master";
    }
  },
  function replaceRavenWithPush(word) {
    if(word === "raven") {
      return "push";
    }
  }
];

function applyFilters(word) {
  return filters.reduce(function(previous, current) {
    var transformed = current(previous);
    return !!transformed ? transformed : previous;
  }, word);
}

var gitArgs = process.argv.slice(2).map(applyFilters);

try {
execFile('git', gitArgs, {
  stdio: 'inherit'
});
} catch(e) {
  //We're inheriting streams, so whatever
}