diff --git a/.github/workflows/build-and-test-differential-self-hosted.yaml b/.github/workflows/build-and-test-differential-self-hosted.yaml
index b6840197..c245f54a 100644
--- a/.github/workflows/build-and-test-differential-self-hosted.yaml
+++ b/.github/workflows/build-and-test-differential-self-hosted.yaml
@@ -29,10 +29,14 @@ jobs:
             container: ros:humble
             build-depends-repos: build_depends.repos
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
+      - name: Set PR fetch depth
+        run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"
+
+      - name: Checkout PR branch and all PR commits
+        uses: actions/checkout@v4
         with:
-          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
 
       - name: Remove exec_depend
         uses: autowarefoundation/autoware-github-actions/remove-exec-depend@v1
diff --git a/.github/workflows/build-and-test-differential.yaml b/.github/workflows/build-and-test-differential.yaml
index bedc2bab..827c329e 100644
--- a/.github/workflows/build-and-test-differential.yaml
+++ b/.github/workflows/build-and-test-differential.yaml
@@ -22,10 +22,14 @@ jobs:
             container: ros:humble
             build-depends-repos: build_depends.repos
     steps:
-      - name: Check out repository
+      - name: Set PR fetch depth
+        run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"
+
+      - name: Checkout PR branch and all PR commits
         uses: actions/checkout@v4
         with:
-          fetch-depth: 1
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
 
       - name: Show disk space before the tasks
         run: df -h