GraphQLだと返ってきます。

{ "data": { "repository": { "refs": { "pageInfo": { "endCursor": "MTAw", "hasNextPage": true, "startCursor": "MQ==" }, "tags": [ { "name": "swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a" }, { "name": "swift-4.1.1-RELEASE" }, { "name": "swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a" }, …