diff --git a/.github/workflows/extension_bump.yml b/.github/workflows/extension_bump.yml
index db6c7e1bbcb3f56ccbebe40a4f14a673318812b9..4b0ba05201a9161eaaed3f983e9c23e392e61683 100644
--- a/.github/workflows/extension_bump.yml
+++ b/.github/workflows/extension_bump.yml
@@ -40,7 +40,7 @@ jobs:
         CURRENT_VERSION="$(sed -n 's/^version = \"\(.*\)\"/\1/p' < extension.toml | tr -d '[:space:]')"
 
         if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-            PR_FORK_POINT="$(git merge-base --fork-point origin/main)"
+            PR_FORK_POINT="$(git merge-base --fork-point origin/main HEAD)"
             git checkout "$PR_FORK_POINT"
         elif BRANCH_PARENT_SHA="$(git merge-base origin/main origin/zed-zippy-autobump)"; then
             git checkout "$BRANCH_PARENT_SHA"
diff --git a/.github/workflows/extension_tests.yml b/.github/workflows/extension_tests.yml
index 0a10bce2c75cd15e9aaa5cf3d2b8663500d9a80a..169352b6ea0ad2244533386d928df9667bcfe804 100644
--- a/.github/workflows/extension_tests.yml
+++ b/.github/workflows/extension_tests.yml
@@ -115,7 +115,7 @@ jobs:
         CURRENT_VERSION="$(sed -n 's/^version = \"\(.*\)\"/\1/p' < extension.toml | tr -d '[:space:]')"
 
         if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-            PR_FORK_POINT="$(git merge-base --fork-point origin/main)"
+            PR_FORK_POINT="$(git merge-base --fork-point origin/main HEAD)"
             git checkout "$PR_FORK_POINT"
         elif BRANCH_PARENT_SHA="$(git merge-base origin/main origin/zed-zippy-autobump)"; then
             git checkout "$BRANCH_PARENT_SHA"
diff --git a/tooling/xtask/src/tasks/workflows/extension_bump.rs b/tooling/xtask/src/tasks/workflows/extension_bump.rs
index a2b618a88fe521222fbd971a7d42bc6686ab84a9..d435cb9bfca5bcca4041a549515b8b18a4c40633 100644
--- a/tooling/xtask/src/tasks/workflows/extension_bump.rs
+++ b/tooling/xtask/src/tasks/workflows/extension_bump.rs
@@ -151,7 +151,7 @@ pub(crate) fn compare_versions() -> (Step<Run>, StepOutput, StepOutput) {
         CURRENT_VERSION="$({VERSION_CHECK})"
 
         if [[ "${{{{ github.event_name }}}}" == "pull_request" ]]; then
-            PR_FORK_POINT="$(git merge-base --fork-point origin/main)"
+            PR_FORK_POINT="$(git merge-base --fork-point origin/main HEAD)"
             git checkout "$PR_FORK_POINT"
         elif BRANCH_PARENT_SHA="$(git merge-base origin/main origin/zed-zippy-autobump)"; then
             git checkout "$BRANCH_PARENT_SHA"