diff --git a/__tests__/git.test.ts b/__tests__/git.test.ts
index 6bb2b3c9..e0bb55e9 100644
--- a/__tests__/git.test.ts
+++ b/__tests__/git.test.ts
@@ -408,6 +408,50 @@ describe('ref', () => {
     const ref = await Git.ref();
     expect(ref).toEqual('refs/remotes/unusual-format');
   });
+
+  it('returns mocked detached tag ref when commit also has branch decorations', async () => {
+    vi.spyOn(Exec, 'getExecOutput').mockImplementation((cmd, args): Promise<ExecOutput> => {
+      const fullCmd = `${cmd} ${args?.join(' ')}`;
+      let result = '';
+      switch (fullCmd) {
+        case 'git branch --show-current':
+          result = '';
+          break;
+        case 'git show -s --pretty=%D':
+          result = 'HEAD, tag: v8.0.0, origin/release-branch';
+          break;
+      }
+      return Promise.resolve({
+        stdout: result,
+        stderr: '',
+        exitCode: 0
+      });
+    });
+    const ref = await Git.ref();
+    expect(ref).toEqual('refs/tags/v8.0.0');
+  });
+
+  it('returns mocked detached tag ref (shallow clone) when commit also has branch decorations', async () => {
+    vi.spyOn(Exec, 'getExecOutput').mockImplementation((cmd, args): Promise<ExecOutput> => {
+      const fullCmd = `${cmd} ${args?.join(' ')}`;
+      let result = '';
+      switch (fullCmd) {
+        case 'git branch --show-current':
+          result = '';
+          break;
+        case 'git show -s --pretty=%D':
+          result = 'grafted, HEAD, tag: v8.0.0, origin/release-branch';
+          break;
+      }
+      return Promise.resolve({
+        stdout: result,
+        stderr: '',
+        exitCode: 0
+      });
+    });
+    const ref = await Git.ref();
+    expect(ref).toEqual('refs/tags/v8.0.0');
+  });
 });
 
 describe('fullCommit', () => {
diff --git a/src/git.ts b/src/git.ts
index addedfa1..e59961ea 100644
--- a/src/git.ts
+++ b/src/git.ts
@@ -138,7 +138,7 @@ export class Git {
 
     // Tag refs are formatted as "tag: <tagname>"
     if (ref.startsWith('tag: ')) {
-      return `refs/tags/${ref.split(':')[1].trim()}`;
+      return `refs/tags/${ref.slice('tag: '.length).split(',')[0].trim()}`;
     }
 
     // Pull request merge refs are formatted as "pull/<number>/<state>"