private void receiveCreateBranchData() {
    /* Формируем GET HTTP-запрос по ресурсу
    https://gitlab.com/projects/:id/repository/branches */
    Mono<JsonNode> eventsRequest = client.get()
        .uri(uriBuilder -> uriBuilder
            .path("projects/:id/repository/branches/")
            .build())
        .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
        .retrieve()
        .bodyToMono(JsonNode.class);
    JsonNode[] responseData = eventsRequest.block();
    for (JsonNode jsonNode:responseData) {
        Pair<String, JsonNode> eventData = new Pair<>("create_branch", "jsonNode");
        receivedEventData.put(item);
    }
}