Rerender entire tree

components.a-child.js

import Ember from 'ember';

export default Ember.Component.extend({
  didReceiveAttrs(){
    this._super(...arguments)
    console.log('didReceiveAttrs', 'a-child')
  }

});

components.the-parent.js

import Ember from 'ember';

export default Ember.Component.extend({
  aPropertyInsideTheParent: "a",
  didReceiveAttrs(){
    this._super(...arguments)
    console.log('didReceiveAttrs', 'the-parent')
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  data: {val: 1},
  actions: {
    increment(){
      Ember.set(this, "data", {
        val: Ember.get(this, "data.val") + 1
      })
    }
  }
});

templates.application.hbs

<button {{action "increment"}}>Inc</button>
{{the-parent data=data}}
<p> Open the console to see `a-child` component rerendering even though nothing passed to them changed.</p>

templates.components.a-child.hbs

a-child component: {{val}}

templates.components.the-parent.hbs

{{data.val}}
{{a-child val=aPropertyInsideTheParent}}
{{a-child val=aPropertyInsideTheParent}}
{{a-child val=aPropertyInsideTheParent}}
{{a-child val=aPropertyInsideTheParent}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "beta",
    "ember-data": "2.8.0",
    "ember-template-compiler": "beta",
    "ember-testing": "beta"
  },
  "addons": {}
}