extensions/git/src/git.ts/GitError/constructor
class GitError:	constructor(data: IGitErrorData) {
		if (data.error) {
			this.error = data.error;
			this.message = data.error.message;
		} else {
			this.error = undefined;
			this.message = '';
		}

		this.message = this.message || data.message || 'Git error';
		this.stdout = data.stdout;
		this.stderr = data.stderr;
		this.exitCode = data.exitCode;
		this.gitErrorCode = data.gitErrorCode;
		this.gitCommand = data.gitCommand;
		this.gitArgs = data.gitArgs;
	}