BUG: go-git clone is incomplete and Why do I need to pull twice to pull the latest code?

[SunYonge]

In addition, sometimes my network is relatively poor, which will cause errors when I use go-git (incomplete warehouse pull), prompting error: reference not found, or some files indicate that they have not been cloned, only if I completely delete the local warehouse generated by using go-git, and execute go-git clone again, the clone can proceed normally. How can I solve this problem?
Our project has to use go-git/v5, but these two problems have been bothering me for a long time, help me, homie.

}
if err != nil {
	runLog.Error("Clone project failed")
	return -1, err
} else {
	runLog.Info("git clone done.")
}

// 获取远程分支的引用
remoteRef, err := repo.Reference(plumbing.ReferenceName("refs/remotes/origin/"+r.Branch), true)
if err != nil {
	runLog.Errorf("get repo remote ref error, err: %v", err)
	return -1, err
} else {
	runLog.Info("get remoteRef done.")
}

// 创建本地分支引用
localRef := plumbing.NewHashReference(plumbing.ReferenceName("refs/heads/"+r.Branch), remoteRef.Hash())
runLog.Info("create localRef done.")

w, err := repo.Worktree()
if err != nil {
	runLog.Errorf("worktree error: %v", err)
	return -1, err
}

// 拉取最新的代码
err = w.Pull(&git.PullOptions{
	ReferenceName: localRef.Name(),
	Auth:          pk,
})
if err != nil && err != git.NoErrAlreadyUpToDate {
	runLog.Errorf("Failed to pull latest code: %v", err)
} else {
	runLog.Info("git pull done.")
}

// 更新本地分支引用
err = repo.Storer.SetReference(localRef)
if err != nil {
	runLog.Errorf("Failed to set local reference: %v", err)
} else {
	runLog.Info("update localRef done.")
}

// 检出本地分支
err = w.Checkout(&git.CheckoutOptions{
	Branch: plumbing.ReferenceName("refs/heads/" + r.Branch),
	Force:  true,
})
if err != nil {
	runLog.Errorf("Failed to checkout branch: %v", err)
	//return -1, err
}
runLog.Infof("Fetch and checkout complete.")