diff --git a/lib/modules/datasource/github-tags/index.spec.ts b/lib/modules/datasource/github-tags/index.spec.ts
index e3315fa0844549..e93874312132a2 100644
--- a/lib/modules/datasource/github-tags/index.spec.ts
+++ b/lib/modules/datasource/github-tags/index.spec.ts
@@ -33,85 +33,63 @@ describe('modules/datasource/github-tags/index', () => {
 
   describe('getDigest', () => {
     const packageName = 'some/dep';
-    const tag = 'v1.2.0';
 
-    it('returns null if no token', async () => {
+    it('returns commit digest', async () => {
       httpMock
         .scope(githubApiHost)
         .get(`/repos/${packageName}/commits?per_page=1`)
-        .reply(200, []);
+        .reply(200, [{ sha: 'abcdef' }]);
+
       const res = await github.getDigest({ packageName }, null);
-      expect(res).toBeNull();
+
+      expect(res).toBe('abcdef');
     });
 
-    it('returns digest', async () => {
+    it('returns null for missing commit', async () => {
       httpMock
         .scope(githubApiHost)
         .get(`/repos/${packageName}/commits?per_page=1`)
-        .reply(200, [{ sha: 'abcdef' }]);
+        .reply(200, []);
+
       const res = await github.getDigest({ packageName }, null);
-      expect(res).toBe('abcdef');
-    });
 
-    it('returns commit digest', async () => {
-      httpMock
-        .scope(githubApiHost)
-        .get(`/repos/${packageName}/git/refs/tags/${tag}`)
-        .reply(200, { object: { type: 'commit', sha: 'ddd111' } });
-      const res = await github.getDigest({ packageName }, tag);
-      expect(res).toBe('ddd111');
+      expect(res).toBeNull();
     });
 
-    it('returns tagged commit digest', async () => {
-      httpMock
-        .scope(githubApiHost)
-        .get(`/repos/${packageName}/git/refs/tags/${tag}`)
-        .reply(200, {
-          object: { type: 'tag', url: `${githubApiHost}/some-url` },
-        })
-        .get('/some-url')
-        .reply(200, { object: { type: 'commit', sha: 'ddd111' } });
-      const res = await github.getDigest({ packageName }, tag);
-      expect(res).toBe('ddd111');
-    });
+    it('returns tag digest', async () => {
+      tagsCacheGetItems.mockResolvedValueOnce([
+        { version: 'v1.0.0', releaseTimestamp: '2021-01-01', hash: 'aaa' },
+        { version: 'v2.0.0', releaseTimestamp: '2022-01-01', hash: 'bbb' },
+      ]);
 
-    it('warns if unknown ref', async () => {
-      httpMock
-        .scope(githubApiHost)
-        .get(`/repos/${packageName}/git/refs/tags/${tag}`)
-        .reply(200, { object: { sha: 'ddd111' } });
-      const res = await github.getDigest({ packageName }, tag);
-      expect(res).toBeNull();
+      const res = await github.getDigest({ packageName }, 'v2.0.0');
+
+      expect(res).toBe('bbb');
     });
 
-    it('returns null for missed tagged digest', async () => {
-      httpMock
-        .scope(githubApiHost)
-        .get(`/repos/${packageName}/git/refs/tags/${tag}`)
-        .reply(200, {});
-      const res = await github.getDigest({ packageName: 'some/dep' }, 'v1.2.0');
+    it('returns null for missing tag', async () => {
+      tagsCacheGetItems.mockResolvedValueOnce([
+        { version: 'v1.0.0', releaseTimestamp: '2021-01-01', hash: 'aaa' },
+        { version: 'v2.0.0', releaseTimestamp: '2022-01-01', hash: 'bbb' },
+      ]);
+
+      const res = await github.getDigest({ packageName }, 'v3.0.0');
+
       expect(res).toBeNull();
     });
 
-    it('supports ghe', async () => {
+    it('supports GHE', async () => {
       httpMock
         .scope(githubEnterpriseApiHost)
-        .get(`/api/v3/repos/${packageName}/git/refs/tags/${tag}`)
-        .reply(200, { object: { type: 'commit', sha: 'ddd111' } })
         .get(`/api/v3/repos/${packageName}/commits?per_page=1`)
         .reply(200, [{ sha: 'abcdef' }]);
 
-      const sha1 = await github.getDigest(
+      const res = await github.getDigest(
         { packageName, registryUrl: githubEnterpriseApiHost },
         null
       );
-      const sha2 = await github.getDigest(
-        { packageName: 'some/dep', registryUrl: githubEnterpriseApiHost },
-        'v1.2.0'
-      );
 
-      expect(sha1).toBe('abcdef');
-      expect(sha2).toBe('ddd111');
+      expect(res).toBe('abcdef');
     });
   });
 
diff --git a/lib/modules/datasource/github-tags/index.ts b/lib/modules/datasource/github-tags/index.ts
index 03a3bb573c35ab..dafdad72bbf9b0 100644
--- a/lib/modules/datasource/github-tags/index.ts
+++ b/lib/modules/datasource/github-tags/index.ts
@@ -9,7 +9,6 @@ import type {
   ReleaseResult,
 } from '../types';
 import { CacheableGithubTags } from './cache';
-import type { TagResponse } from './types';
 
 export class GithubTagsDatasource extends GithubReleasesDatasource {
   static override readonly id = 'github-tags';
@@ -21,37 +20,21 @@ export class GithubTagsDatasource extends GithubReleasesDatasource {
     this.tagsCache = new CacheableGithubTags(this.http);
   }
 
-  @cache({
-    ttlMinutes: 120,
-    namespace: `datasource-${GithubTagsDatasource.id}`,
-    key: (registryUrl: string, githubRepo: string, tag: string) =>
-      `${registryUrl}:${githubRepo}:tag-${tag}`,
-  })
   async getTagCommit(
     registryUrl: string | undefined,
-    githubRepo: string,
+    packageName: string,
     tag: string
   ): Promise<string | null> {
-    const apiBaseUrl = getApiBaseUrl(registryUrl);
-    let digest: string | null = null;
-    try {
-      const url = `${apiBaseUrl}repos/${githubRepo}/git/refs/tags/${tag}`;
-      const res = (await this.http.getJson<TagResponse>(url)).body.object;
-      if (res.type === 'commit') {
-        digest = res.sha;
-      } else if (res.type === 'tag') {
-        digest = (await this.http.getJson<TagResponse>(res.url)).body.object
-          .sha;
-      } else {
-        logger.warn({ res }, 'Unknown git tag refs type');
-      }
-    } catch (err) {
-      logger.debug(
-        { githubRepo, err },
-        'Error getting tag commit from GitHub repo'
-      );
+    let result: string | null = null;
+    const tagReleases = await this.tagsCache.getItems({
+      packageName,
+      registryUrl,
+    });
+    const tagRelease = tagReleases.find(({ version }) => version === tag);
+    if (tagRelease) {
+      result = tagRelease.hash;
     }
-    return digest;
+    return result;
   }
 
   @cache({
diff --git a/lib/modules/datasource/github-tags/types.ts b/lib/modules/datasource/github-tags/types.ts
deleted file mode 100644
index e8b5888166c0b2..00000000000000
--- a/lib/modules/datasource/github-tags/types.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-export interface TagResponse {
-  object: {
-    type: string;
-    url: string;
-    sha: string;
-  };
-}
-
-export interface GitHubTag {
-  name: string;
-}