type Query {
  pet: Dog
}

type Dog {
  nickname: String
  name: String!
}

query queryPupper {
  pet {
    ...mergeIdenticalFields
    ...mergeIdenticalAliasesAndFields
  }
}

fragment mergeIdenticalFields on Dog {
  name
  name
}

fragment mergeIdenticalAliasesAndFields on Dog {
  otherName: name
  otherName: name
}