Vue refs Issue for children in v-for

HTML

<div id="app">
  <h2>Todos:</h2>
  <ol ref="orderedList">
    <li v-for="(todo, i) in todos" :class="{active: !i}">
      <label>
        <input type="checkbox"
          :ref="'input' + i"
          v-on:change="toggle(todo)"
          v-bind:checked="todo.done">

        <del v-if="todo.done">
          {{ todo.text }}
        </del>
        <span v-else>
          {{ todo.text }}
        </span>
      </label>
    </li>
  </ol>
  <test-component></test-component>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

Vue.component('test-component', {
	template: `
  	<ol ref="orderedList">
    	<li v-for="(item, index) in list" :class="{active: !index}" ref="'item' + index">{{item.name}}</li>
    </ol>
  `,
	data() {
  	return {
    	list: [
      	{name: 'John'},
        {name: 'Alex'},
        {name: 'Sam'},
        {name: 'Shtefan'},
      ]
    };
  },
  mounted() {
  	const ol = this.$refs.orderedList;
    const active = ol.querySelector('.active');
    console.log(ol, active);
  }
});

new Vue({
  el: "#app",
  data: {
    todos: [
      { text: "Learn JavaScript", done: false },
      { text: "Learn Vue", done: false },
      { text: "Play around in JSFiddle", done: true },
      { text: "Build something awesome", done: true }
    ]
  },
  methods: {
  	toggle: function(todo){
    	console.log(this.$refs)
    	todo.done = !todo.done
    }
  },
  mounted() {
  	console.log(this.$refs);
    console.log(this.$refs.orderedList); 
    const active = this.$refs.orderedList.querySelector('.active');
    console.log(active);
  }
})