diff --git a/.github/workflows/upstream pretest.yaml b/.github/workflows/upstream pretest.yaml
index 9c031147..270c5c27 100644
--- a/.github/workflows/upstream pretest.yaml	
+++ b/.github/workflows/upstream pretest.yaml	
@@ -464,15 +464,16 @@ jobs:
                     New-Item -ItemType Directory -Path $main_repo_dir | Out-Null
                     Push-Location $main_repo_dir
                     $main_repo_url = '${{ github.server_url }}/${{ github.repository }}'
-                    $main_repo_branch = '${{ github.event.repository.default_branch }}'
-                    Write-Host "Cloning main repo [$main_repo_url]: branch [$main_repo_branch]"
+                    Write-Host "Cloning main repo [$main_repo_url]"
                     git init
                     if (-not $?) { throw "git init failed" }
                     git remote add origin $main_repo_url
                     if (-not $?) { throw "git remote add failed" }
+                    git config --local --name-only --get-regexp core\.sshCommand
+                    git config --local --name-only --get-regexp http\.https\:\/\/github\.com\/\.extraheader
                     git config --local http.https://github.com/.extraheader "AUTHORIZATION: basic ${{ secrets.GITHUB_TOKEN }}"
                     if (-not $?) { throw "git config failed" }
-                    git fetch --depth=1 origin $main_repo_branch --filter=tree:0 --no-progress
+                    git fetch -c protocol.version=2 --no-tags --prune --depth=1 origin --filter=tree:0 --no-progress
                     if (-not $?) { throw "git fetch failed" }
                     
                     # git branch -r