How can I loop over site blueprint field values

site.yaml

form:
  fields:
    social:
      type: section
      title: Social
      fields:
        twitter:
          label: Twitter
          url: "#"
          icon: twitter
        facebook:
          label: Facebook
          url: "#"
          icon: facebook
 {% for field in site.social.fields %}
  // dosmth 
{% endfor %}

Using config.site should work