diff --git a/.github/workflows/A.yml b/.github/workflows/A.yml
deleted file mode 100644
index 5cec005..0000000
--- a/.github/workflows/A.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: Workflow A
-on: push
-
-jobs:
-  sleep:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Before
-        run: echo "..."
-      - name: Sleep
-        run: sleep 60
-      - name: After
-        run: echo "done"
diff --git a/.github/workflows/B.yml b/.github/workflows/B.yml
deleted file mode 100644
index 1feda77..0000000
--- a/.github/workflows/B.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: Workflow B
-on: push
-
-jobs:
-  sleep:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Before
-        run: echo "..."
-      - name: Sleep
-        run: sleep 60
-      - name: After
-        run: echo "done"
diff --git a/.github/workflows/cancel-dups.yml b/.github/workflows/cancel-dups.yml
deleted file mode 100644
index 555ccb6..0000000
--- a/.github/workflows/cancel-dups.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: Cancelling
-on:
-  workflow_run:
-    workflows:
-      - Workflow A
-      - Workflow B
-    types: [ 'requested' ]
-
-jobs:
-  cancel-dups:
-    name: Cancel duplicate workflow runs
-    runs-on: ubuntu-latest
-    if: github.event.workflow_run.name != 'Workflow B'
-
-    steps:
-      - uses: potiuk/cancel-workflow-runs@master
-        name: "Cancel duplicate workflow runs"
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          cancelMode: duplicates
-          sourceRunId: ${{ github.event.workflow_run.id }}
-
-  cancel-builds:
-    name: Cancel duplicate builds
-    runs-on: ubuntu-latest
-
-    # Keep the branch part of this condition in sync with the corresponding condition in build.yml
-    if: >
-      github.event.workflow_run.name == 'Workflow B' && ! (
-        github.event.workflow_run.head_branch == '🙄'
-      )
-
-    steps:
-      - uses: potiuk/cancel-workflow-runs@master
-        name: "Cancel duplicate builds"
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          cancelMode: duplicates
-          sourceRunId: ${{ github.event.workflow_run.id }}
diff --git a/.github/workflows/dump.yml b/.github/workflows/dump.yml
new file mode 100644
index 0000000..e009966
--- /dev/null
+++ b/.github/workflows/dump.yml
@@ -0,0 +1,19 @@
+name: Dump
+on: pull_request
+
+jobs:
+  dump:
+    name: Dump foo.txt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - run: |
+          git fetch origin "$GITHUB_BASE_REF"
+          git config --global user.name "$GITHUB_ACTOR"
+          git config --global user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+          git merge FETCH_HEAD
+      - run: cat foo.txt
+      - run: git branch -a
+      - run: git log
diff --git a/foo.txt b/foo.txt
index 00750ed..7ed6ff8 100644
--- a/foo.txt
+++ b/foo.txt
@@ -1 +1 @@
-3
+5