diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 59033f9f..50266cdb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -211,13 +211,12 @@ jobs:
       max-parallel: 4
       matrix:
         platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
-        fetch-depth: [1, 2]
 
     steps:
       - name: Checkout to branch
         uses: actions/checkout@v3
         with:
-          fetch-depth: ${{ matrix.fetch-depth }}
+          fetch-depth: 2
 
       - name: Run changed-files
         id: changed-files
diff --git a/diff-sha.sh b/diff-sha.sh
index 95807a14..d7e396aa 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -83,7 +83,7 @@ if [[ -z $GITHUB_BASE_REF ]]; then
       fi
     else
       git fetch --no-tags -u --progress --depth="$INPUT_FETCH_DEPTH" origin "$TARGET_BRANCH":"$TARGET_BRANCH"
- 
+
       PREVIOUS_SHA=$(git rev-list --no-merges -n 1 "$TARGET_BRANCH" 2>&1) && exit_status=$? || exit_status=$?
       
       if [[ -z "$PREVIOUS_SHA" ]]; then
@@ -135,6 +135,7 @@ else
 
   if [[ -z $INPUT_BASE_SHA ]]; then
     git fetch --no-tags -u --progress --depth="$INPUT_FETCH_DEPTH" origin "$TARGET_BRANCH":"$TARGET_BRANCH"
+    git fetch --no-tags -u --progress origin "$CURRENT_BRANCH":"$CURRENT_BRANCH"
 
     PREVIOUS_SHA=$(git rev-list --no-merges -n 1 "$TARGET_BRANCH" 2>&1) && exit_status=$? || exit_status=$?
     if [[ -z "$PREVIOUS_SHA" ]]; then
@@ -143,6 +144,7 @@ else
     echo "::debug::Previous SHA: $PREVIOUS_SHA"
   else
     git fetch --no-tags -u --progress --depth="$INPUT_FETCH_DEPTH" origin "$INPUT_BASE_SHA" && exit_status=$? || exit_status=$?
+    git fetch --no-tags -u --progress origin "$CURRENT_BRANCH":"$CURRENT_BRANCH"
     PREVIOUS_SHA=$INPUT_BASE_SHA && exit_status=$? || exit_status=$?
   fi