skip auth only for auto fetch

related to #72615

extensions/git/src/askpass-main.ts

@@ -28,6 +28,10 @@ function main(argv: string[]): void {
 		return fatal('Missing pipe');
 	}
 
+	if (process.env['VSCODE_GIT_COMMAND'] === 'fetch' && !!process.env['VSCODE_GIT_FETCH_SILENT']) {
+		return fatal('Skip silent fetch commands');
+	}
+
 	const output = process.env['VSCODE_GIT_ASKPASS_PIPE'] as string;
 	const socketPath = process.env['VSCODE_GIT_ASKPASS_HANDLE'] as string;
 	const request = argv[2];

extensions/git/src/autofetch.ts

@@ -99,7 +99,7 @@ export class AutoFetcher {
 			}
 
 			try {
-				await this.repository.fetchDefault();
+				await this.repository.fetchDefault({ silent: true });
 			} catch (err) {
 				if (err.gitErrorCode === GitErrorCodes.AuthenticationFailed) {
 					this.disable();

extensions/git/src/git.ts

@@ -1401,8 +1401,9 @@ export class Repository {
 		await this.run(args);
 	}
 
-	async fetch(options: { remote?: string, ref?: string, all?: boolean, prune?: boolean, depth?: number } = {}): Promise<void> {
+	async fetch(options: { remote?: string, ref?: string, all?: boolean, prune?: boolean, depth?: number, silent?: boolean } = {}): Promise<void> {
 		const args = ['fetch'];
+		const spawnOptions: SpawnOptions = {};
 
 		if (options.remote) {
 			args.push(options.remote);
@@ -1422,8 +1423,12 @@ export class Repository {
 			args.push(`--depth=${options.depth}`);
 		}
 
+		if (options.silent) {
+			spawnOptions.env = { 'VSCODE_GIT_FETCH_SILENT': 'true' };
+		}
+
 		try {
-			await this.run(args);
+			await this.run(args, spawnOptions);
 		} catch (err) {
 			if (/No remote repository specified\./.test(err.stderr || '')) {
 				err.gitErrorCode = GitErrorCodes.NoRemoteRepositorySpecified;

extensions/git/src/repository.ts

@@ -1054,8 +1054,8 @@ export class Repository implements Disposable {
 	}
 
 	@throttle
-	async fetchDefault(): Promise<void> {
-		await this.run(Operation.Fetch, () => this.repository.fetch());
+	async fetchDefault(options: { silent?: boolean } = {}): Promise<void> {
+		await this.run(Operation.Fetch, () => this.repository.fetch(options));
 	}
 
 	@throttle