Returning Child and Grandparent without parent... ie flattening

Elastic Stack Elasticsearch
1

Has anyone been able to return the granchild and grandparent record without the parent returned as well?

I have the following which returns all 3. However, I'd like to return A and C from a hierarchy like A=>B=>C.

{
  "query" : {
    "has_child" : {
      "query" : {
        "has_child" : {
          "query" : {
            "match_all" : {}
          },
          "child_type" : "grandchild"
        }
      },
      "child_type" : "child"
    }
  },
  "inner_hits" : {
    "child" : {
      "type" : {
        "child" : {
          "inner_hits" : {
            "child" : {
              "type" : {
                "grandchild" : {}
              }
            }
          }
        }
      }
    }
  }
}