diff --git a/README.md b/README.md
index 6825eb15..3d7d70bd 100644
--- a/README.md
+++ b/README.md
@@ -462,6 +462,26 @@ jobs:
 
 </details>
 
+<details>
+  <summary>Using git commands to detect changes</summary>
+
+```yaml
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+          fetch-depth: 2 # To retrieve the preceding commit.
+    - uses: dorny/paths-filter@v2
+      id: filter
+      with:
+        filters: .github/filters.yaml
+      token: '' # Use git commands
+```
+
+</details>
+
 ### Custom processing of changed files
 
 <details>
diff --git a/dist/index.js b/dist/index.js
index 06028273..6c8098d5 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -317,7 +317,7 @@ async function getCurrentRef() {
         if (describe.exitCode === 0) {
             return describe.stdout.trim();
         }
-        return (await exec_1.getExecOutput('git', ['rev-parse', exports.HEAD])).stdout.trim();
+        return (await exec_1.getExecOutput('git', ['rev-parse', `${exports.HEAD}^2`])).stdout.trim();
     }
     finally {
         core.endGroup();
@@ -1284,8 +1284,8 @@ class OidcClient {
             const res = yield httpclient
                 .getJson(id_token_url)
                 .catch(error => {
-                throw new Error(`Failed to get ID Token. \n 
-        Error Code : ${error.statusCode}\n 
+                throw new Error(`Failed to get ID Token. \n
+        Error Code : ${error.statusCode}\n
         Error Message: ${error.result.message}`);
             });
             const id_token = (_a = res.result) === null || _a === void 0 ? void 0 : _a.value;
@@ -38003,7 +38003,7 @@ module.exports = JSON.parse('[[[0,44],"disallowed_STD3_valid"],[[45,46],"valid"]
 /************************************************************************/
 /******/ 	// The module cache
 /******/ 	var __webpack_module_cache__ = {};
-/******/ 	
+/******/
 /******/ 	// The require function
 /******/ 	function __nccwpck_require__(moduleId) {
 /******/ 		// Check if module is in cache
@@ -38017,7 +38017,7 @@ module.exports = JSON.parse('[[[0,44],"disallowed_STD3_valid"],[[45,46],"valid"]
 /******/ 			// no module.loaded needed
 /******/ 			exports: {}
 /******/ 		};
-/******/ 	
+/******/
 /******/ 		// Execute the module function
 /******/ 		var threw = true;
 /******/ 		try {
@@ -38026,23 +38026,23 @@ module.exports = JSON.parse('[[[0,44],"disallowed_STD3_valid"],[[45,46],"valid"]
 /******/ 		} finally {
 /******/ 			if(threw) delete __webpack_module_cache__[moduleId];
 /******/ 		}
-/******/ 	
+/******/
 /******/ 		// Return the exports of the module
 /******/ 		return module.exports;
 /******/ 	}
-/******/ 	
+/******/
 /************************************************************************/
 /******/ 	/* webpack/runtime/compat */
-/******/ 	
+/******/
 /******/ 	if (typeof __nccwpck_require__ !== 'undefined') __nccwpck_require__.ab = __dirname + "/";
-/******/ 	
+/******/
 /************************************************************************/
-/******/ 	
+/******/
 /******/ 	// startup
 /******/ 	// Load entry module and return exports
 /******/ 	// This entry module is referenced by other modules so it can't be inlined
 /******/ 	var __webpack_exports__ = __nccwpck_require__(3109);
 /******/ 	module.exports = __webpack_exports__;
-/******/ 	
+/******/
 /******/ })()
-;
\ No newline at end of file
+;
diff --git a/src/git.ts b/src/git.ts
index a4132362..7a36c201 100644
--- a/src/git.ts
+++ b/src/git.ts
@@ -176,7 +176,7 @@ export async function getCurrentRef(): Promise<string> {
       return describe.stdout.trim()
     }
 
-    return (await getExecOutput('git', ['rev-parse', HEAD])).stdout.trim()
+    return (await getExecOutput('git', ['rev-parse', `${HEAD}^2`])).stdout.trim()
   } finally {
     core.endGroup()
   }