branch-usage-checker/app/Fetchers/GitHubRestApi.php

<?php

namespace App\Fetchers;

use Illuminate\Support\Facades\Http;

class GitHubRestApi {
    public static function getBranches( string $vendor, string $package ) : array {
        $pages = self::downloader( $vendor, $package );
        $pages = \collect($pages)
            ->flatten(1)
            ->toArray();

        return $pages;
    }

    public static function downloader( $vendor, $package ) : array {
        $responses = [];

        $continue = true;
        $page     = 1;
        $gh_api   = sprintf(
            'https://api.github.com/repos/%s/%s/branches?per_page=100',
            $vendor,
            $package
        );

        while ( $continue ) {
            $response = Http::get( $gh_api . '&page=' . $page );

            if ( empty( $response ) ) {
                $continue = false;
            }

            $responses[ $page ] = $response;
            $page ++;
        }

        return $responses;
    }
}