diff --git a/dist/index.js b/dist/index.js
index 7155f1c..9ec08b0 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -7101,6 +7101,26 @@ class GitCommandManager {
             yield this.execGit(args);
         });
     }
+    submoduleReset(recursive) {
+        return __awaiter(this, void 0, void 0, function* () {
+            const args = ['submodule', 'foreach'];
+            if (recursive) {
+                args.push('--recursive');
+            }
+            args.push('git reset --hard');
+            yield this.execGit(args);
+        });
+    }
+    submoduleClean(recursive) {
+        return __awaiter(this, void 0, void 0, function* () {
+            const args = ['submodule', 'foreach'];
+            if (recursive) {
+                args.push('--recursive');
+            }
+            args.push('git clean -ffdx');
+            yield this.execGit(args);
+        });
+    }
     tagExists(pattern) {
         return __awaiter(this, void 0, void 0, function* () {
             const output = yield this.execGit(['tag', '--list', pattern]);
@@ -7416,6 +7436,8 @@ function getSource(settings) {
                     core.startGroup('Fetching submodules');
                     yield git.submoduleSync(settings.nestedSubmodules);
                     yield git.submoduleUpdate(settings.fetchDepth, settings.nestedSubmodules);
+                    yield git.submoduleReset(settings.nestedSubmodules);
+                    yield git.submoduleClean(settings.nestedSubmodules);
                     yield git.submoduleForeach('git config --local gc.auto 0', settings.nestedSubmodules);
                     core.endGroup();
                     // Persist credentials
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index 409a161..6932e96 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -40,6 +40,8 @@ export interface IGitCommandManager {
   submoduleForeach(command: string, recursive: boolean): Promise<string>
   submoduleSync(recursive: boolean): Promise<void>
   submoduleUpdate(fetchDepth: number, recursive: boolean): Promise<void>
+  submoduleReset(recursive: boolean): Promise<void>
+  submoduleClean(recursive: boolean): Promise<void>
   tagExists(pattern: string): Promise<boolean>
   tryClean(): Promise<boolean>
   tryConfigUnset(configKey: string, globalConfig?: boolean): Promise<boolean>
@@ -324,6 +326,26 @@ class GitCommandManager {
     await this.execGit(args)
   }
 
+  async submoduleReset(recursive: boolean): Promise<void> {
+    const args = ['submodule', 'foreach']
+    if (recursive) {
+      args.push('--recursive')
+    }
+    args.push('git reset --hard')
+
+    await this.execGit(args)
+  }
+
+  async submoduleClean(recursive: boolean): Promise<void> {
+    const args = ['submodule', 'foreach']
+    if (recursive) {
+      args.push('--recursive')
+    }
+    args.push('git clean -ffdx')
+
+    await this.execGit(args)
+  }
+
   async tagExists(pattern: string): Promise<boolean> {
     const output = await this.execGit(['tag', '--list', pattern])
     return !!output.stdout.trim()
diff --git a/src/git-source-provider.ts b/src/git-source-provider.ts
index 42a12e0..b95ce3a 100644
--- a/src/git-source-provider.ts
+++ b/src/git-source-provider.ts
@@ -183,6 +183,8 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
           settings.fetchDepth,
           settings.nestedSubmodules
         )
+        await git.submoduleReset(settings.nestedSubmodules)
+        await git.submoduleClean(settings.nestedSubmodules)
         await git.submoduleForeach(
           'git config --local gc.auto 0',
           settings.nestedSubmodules