diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 54504bb4853..813a3078436 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,10 +5,6 @@ on:
     branches:
       - "**"
   pull_request:
-    types:
-      - opened
-      - synchronize
-      - reopened
     branches:
       - main
   pull_request_review:
@@ -28,12 +24,7 @@ jobs:
 
   test-multiple-repositories:
     name: Test with multiple repositories
-    runs-on: ${{ matrix.platform }}
-    strategy:
-      fail-fast: false
-      max-parallel: 2
-      matrix:
-        platform: [ubuntu-latest]
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout into dir1
         uses: actions/checkout@v3
@@ -84,13 +75,8 @@ jobs:
 
   test-using-since-and-until:
     name: Test changed-files using since and until
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     if: github.event_name == 'push'
-    strategy:
-      fail-fast: false
-      max-parallel: 2
-      matrix:
-        platform: [ubuntu-latest]
 
     steps:
       - name: Checkout to branch
@@ -140,12 +126,7 @@ jobs:
 
   test-similar-base-and-commit-sha:
     name: Test changed-files similar base and commit sha
-    runs-on: ${{ matrix.platform }}
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        platform: [ubuntu-latest]
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout to branch
@@ -175,12 +156,7 @@ jobs:
 
   test-unset-github-output-env:
     name: Test unset GITHUB_OUTPUT env
-    runs-on: ${{ matrix.platform }}
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        platform: [ubuntu-latest]
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout to branch
@@ -203,12 +179,11 @@ jobs:
 
   test-limited-commit-history:
     name: Test changed-files with limited commit history
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest]
         fetch-depth: [1, 2]
         input-fetch_depth: [1, 50]
 
@@ -232,12 +207,7 @@ jobs:
 
   test-non-existent-base-sha:
     name: Test changed-files non existent base sha
-    runs-on: ${{ matrix.platform }}
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        platform: [ubuntu-latest]
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout to branch
@@ -284,12 +254,7 @@ jobs:
 
   test-non-existent-sha:
     name: Test changed-files non existent sha
-    runs-on: ${{ matrix.platform }}
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        platform: [ubuntu-latest]
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout to branch
@@ -336,13 +301,12 @@ jobs:
 
   test-submodules:
     name: Test changed-files with submodule
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest]
-        fetch-depth: [0, 1]
+        fetch-depth: [0, 1, 2]
 
     steps:
       - name: Checkout to branch
@@ -380,7 +344,7 @@ jobs:
       max-parallel: 4
       matrix:
         platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, windows-2022]
-        fetch-depth: [0, 1]
+        fetch-depth: [0, 1, 2]
 
     steps:
       - name: Checkout
diff --git a/diff-sha.sh b/diff-sha.sh
index ddd083028ad..e00751bfd34 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -188,13 +188,14 @@ else
 
   if [[ "$IS_SHALLOW" == "true" ]]; then
     echo "Fetching remote refs..."
-
-    if [[ "$GITHUB_EVENT_HEAD_REPO_FORK" != "true" ]]; then
-      # shellcheck disable=SC2086
-      git fetch $EXTRA_ARGS -u --progress origin pull/"$GITHUB_EVENT_PULL_REQUEST_NUMBER"/head:"$CURRENT_BRANCH" 1>/dev/null
+    
+    # shellcheck disable=SC2086
+    if git fetch $EXTRA_ARGS -u --progress origin pull/"$GITHUB_EVENT_PULL_REQUEST_NUMBER"/head:"$CURRENT_BRANCH" 1>/dev/null; then
+      echo "First fetch succeeded"
     else
+      echo "First fetch failed, falling back to second fetch"
       # shellcheck disable=SC2086
-      git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin +refs/heads/"$CURRENT_BRANCH"*:refs/remotes/origin/"$CURRENT_BRANCH"* 1>/dev/null
+      git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin +refs/heads/"$CURRENT_BRANCH"*:refs/remotes/origin/"$CURRENT_BRANCH"* 1>/dev/null || true
     fi
     
     if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" != "true" ]]; then