fix(gitfs): fix fetch args again (#3684)

lib/platform/git/storage.js

@@ -85,10 +85,7 @@ class Storage {
           git = Git(cwd).silent(true);
           await git.raw(['remote', 'set-url', 'origin', config.url]);
           const fetchStart = process.hrtime();
-          await git.fetch(config.url, {
-            '--depth': '2',
-            '--no-single-branch': true,
-          });
+          await git.fetch([config.url, '--depth=2', '--no-single-branch']);
           await determineBaseBranch();
           await resetToBranch(config.baseBranch);
           await cleanLocalBranches();