query CommitPRQuery($owner: String!, $repo: String!, $oid: GitObjectID) {
  repository(owner: $owner, name: $repo) {
    object(oid: $oid) {
      __typename
      ... on Commit {
	associatedPullRequests(first: 1) {
	  nodes {
	    baseRepository {
	      owner {
		__typename
		login
	      }
	    }
	  }
	}
      }
    }
  }
}