Api 如何使用kohsuke github复制文件

我正在使用org.kohsuke.github.*

我有一个示例存储库，其中有一个commit（sha），其中包含一组用作模板的文件

当我在我的应用程序上收到一个名为xyz的请求时，我需要fork-repo-xyz，从#1抓取文件，将文件添加到fork-repo，然后从fork-repo向原始repo-xyz提交PR

这可以通过kohsuke github实现吗

查阅了kohsuke的文件

  public static GHRepository createFork(String repo) throws IOException{
        GHRepository mainRepo = github.getRepository(repo);
        GHRepository forkedRepo = mainRepo.fork();
        GHCommit commit = copyFiles();
        /*QUESTION: Here is where I need help. Now that I have the 
         commit that has the files I need how to I add them to 
        forkedRepo?******** */
        GHCommitBuilder builder = forkedRepo.createCommit();
        return forkedRepo;
    }

    public static GHCommit copyFiles() throws IOException {
        GHRepository mainRepo = github.getRepository("sandbox/xyz");
        /* xxxxxxxxx is the sha of commit that has templated files.        
        GHCommit commit = mainRepo.getCommit("xxxxxxxxxxx"); 

        GHContent content = new GHContent();
        return commit;
    }