Failed push not displaying pre-receive hook error message

Executing a push that is rejected by the pre-receive hook on the server side, the OnPushStatusError notification is not displaying the error message returning by the remote git server, it is just showing the generic error pre-receive hook declined.

Executing the same push but with the git command line, the message error is dsplayed correctly.

# git push origin master
Enumerating objects: 8, done.
Counting objects: 100% (8/8), done.
Delta compression using up to 12 threads
Compressing objects: 100% (4/4), done.
Writing objects: 100% (6/6), 504 bytes | 504.00 KiB/s, done.
Total 6 (delta 2), reused 0 (delta 0)
remote: GL-HOOK-ERR: MY SPECIFIC ERROR MESSAGE
To https://nsgitlab/pablo.nardone/test3.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://nsgitlab/pablo.nardone/test3.git'

Reproduction steps

Setup a pre-receive hook that reject the push with some specific error message. In my case the message is GL-HOOK-ERR: MY SPECIFIC ERROR MESSAGE. Execute from command line git push origin master and verifiy the push si rejected and the specific error message is displayed correctly. Execute the same push operation but this time with the LibGit2Sharp library and verify the push is rejected but only displaying the generic error pre-receive hook declined and not the specific error returning by the pre-receive hook.

try
{
	PushOptions options = new PushOptions
	{
		OnPushStatusError = (PushStatusError pushStatusErrors) =>
		{
			throw new Exception($"OnPushStatusError - Reference({pushStatusErrors.Reference}) Message({pushStatusErrors.Message})");
		},
	};
	repo.Network.Push(branch, options);
}
catch (Exception ex)
{
	Debug.WriteLine(ex.Message);
}

Expected behavior

OnPushStatusError - Reference(refs/heads/master) Message(pre-receive hook declined. GL-HOOK-ERR: MY SPECIFIC ERROR MESSAGE)

Actual behavior

OnPushStatusError - Reference(refs/heads/master) Message(pre-receive hook declined)

Version of LibGit2Sharp (release number or SHA1)

LibGitSharp 0.26.2

Operating system(s) tested; .NET runtime tested

Windows 10 Pro, .NET 4.7.2

从 PushOptions.OnPushStatusError 和复现中展示的 repo.Network.Push 入口点开始，然后跟踪远程拒绝消息如何到达 PushStatusError.Message。复现 pre-receive hook 失败，并将库回调与命令行输出进行比较。当回调同时包含通用拒绝消息和 hook 的具体消息时，即表示完成。