New Twiddle

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
    getLatest() {
      this.send('invalidateModel');
    }
  }
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    var url = 'https://api.github.com/repos/emberjs/ember.js/pulls';
    return Ember.$.getJSON(url).then(function(data) {
      return data.splice(0, 3);
    });
  },
  actions: {
    invalidateModel() {
      this.refresh();
    }
  }
});

templates.index.hbs

<h2>index</h2>
{{#each pr in model}}
  <div><em>Login</em>: {{pr.user.login}}</div>
  <div><em>Created at</em>: {{pr.created_at}}</div>
  <div><em>Title</em>: {{pr.title}}</div>
  <hr/>
{{/each}}
<button {{action "getLatest"}}>Get latest model</button>

twiddle.json

{
  "version": "0.4.0",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.5/ember-data.js"
  }
}