fix: remove fallbacks for the Get-MainBranch check

util.ps1

@@ -37,13 +37,7 @@ function Get-MainBranch {
   } elseif ($allBranches -contains "master") {
     $mainBranch = "master"
   } else {
-    # Get the default branch from git config
     $mainBranch = git config --get init.defaultBranch
-    if (-not $mainBranch) {
-        # Ultimate fallback: use the first branch
-      $mainBranch = $allBranches | Select-Object -First 1
-      if (-not $mainBranch) { $mainBranch = "main" }
-    }
   }
 
   return $mainBranch