Merge branch 'ps/reftable-repo-init-fix'

Clear the fallout from a fix for 2.44 regression.

* ps/reftable-repo-init-fix:
  t0610: remove unused variable assignment
  refs/reftable: don't fail empty transactions in repo without HEAD

refs/reftable-backend.c

@@ -781,6 +781,7 @@ static int reftable_be_transaction_prepare(struct ref_store *ref_store,
 				      &head_referent, &head_type);
 	if (ret < 0)
 		goto done;
+	ret = 0;
 
 	for (i = 0; i < transaction->nr; i++) {
 		struct ref_update *u = transaction->updates[i];

t/t0610-reftable-basics.sh

@@ -328,6 +328,18 @@ test_expect_success 'ref transaction: writes are synced' '
 	EOF
 '
 
+test_expect_success 'ref transaction: empty transaction in empty repo' '
+	test_when_finished "rm -rf repo" &&
+	git init repo &&
+	test_commit -C repo --no-tag A &&
+	git -C repo update-ref -d refs/heads/main &&
+	test-tool -C repo ref-store main delete-refs REF_NO_DEREF msg HEAD &&
+	git -C repo update-ref --stdin <<-EOF
+	prepare
+	commit
+	EOF
+'
+
 test_expect_success 'pack-refs: compacts tables' '
 	test_when_finished "rm -rf repo" &&
 	git init repo &&