diff --git a/lib/modules/manager/terragrunt/__fixtures__/2.hcl b/lib/modules/manager/terragrunt/__fixtures__/2.hcl
index 3c41a5dfc360a0..8aab1449c049f9 100644
--- a/lib/modules/manager/terragrunt/__fixtures__/2.hcl
+++ b/lib/modules/manager/terragrunt/__fixtures__/2.hcl
@@ -155,6 +155,11 @@ terraform {
   source = "git::ssh://git@mygit.com/hashicorp/example?ref=v1.0.3"
 }
 
+# gittags_ssh_subdir
+terraform {
+  source = "git::ssh://git@mygit.com/hashicorp/example//subdir/test?ref=v1.0.4"
+}
+
 # invalid, ignored by test since it does not have source on the next line
 terraform {
 }
diff --git a/lib/modules/manager/terragrunt/__fixtures__/3.hcl b/lib/modules/manager/terragrunt/__fixtures__/3.hcl
index 24e81c345cfc7b..22079aae6c9fe9 100644
--- a/lib/modules/manager/terragrunt/__fixtures__/3.hcl
+++ b/lib/modules/manager/terragrunt/__fixtures__/3.hcl
@@ -155,6 +155,11 @@ terraform {
   source = "git::ssh://git@mygit.com/hashicorp/example?ref=v1.0.3&depth=1"
 }
 
+# gittags_ssh_subdir
+terraform {
+  source = "git::ssh://git@mygit.com/hashicorp/example//subdir/test?ref=v1.0.4&depth=1"
+}
+
 # invalid, ignored by test since it does not have source on the next line
 terraform {
 }
diff --git a/lib/modules/manager/terragrunt/__fixtures__/4.hcl b/lib/modules/manager/terragrunt/__fixtures__/4.hcl
index 8ac54753fe0d21..ae2e971f0a4522 100644
--- a/lib/modules/manager/terragrunt/__fixtures__/4.hcl
+++ b/lib/modules/manager/terragrunt/__fixtures__/4.hcl
@@ -155,6 +155,11 @@ terraform {
   source = "git::ssh://git@mygit.com/hashicorp/example?depth=1&ref=v1.0.3"
 }
 
+# gittags_ssh_subdir
+terraform {
+  source = "git::ssh://git@mygit.com/hashicorp/example//subdir/test?depth=1&ref=v1.0.4"
+}
+
 # invalid, ignored by test since it does not have source on the next line
 terraform {
 }
diff --git a/lib/modules/manager/terragrunt/extract.spec.ts b/lib/modules/manager/terragrunt/extract.spec.ts
index a87f17f6002fe8..8515b80be1a9f3 100644
--- a/lib/modules/manager/terragrunt/extract.spec.ts
+++ b/lib/modules/manager/terragrunt/extract.spec.ts
@@ -200,6 +200,13 @@ describe('modules/manager/terragrunt/extract', () => {
             depType: 'gitTags',
             packageName: 'ssh://git@mygit.com/hashicorp/example',
           },
+          {
+            currentValue: 'v1.0.4',
+            datasource: 'git-tags',
+            depName: 'mygit.com/hashicorp/example',
+            depType: 'gitTags',
+            packageName: 'ssh://git@mygit.com/hashicorp/example',
+          },
           {
             skipReason: 'no-source',
           },
@@ -255,7 +262,7 @@ describe('modules/manager/terragrunt/extract', () => {
           },
         ],
       });
-      expect(res?.deps).toHaveLength(36);
+      expect(res?.deps).toHaveLength(37);
       expect(res?.deps.filter((dep) => dep.skipReason)).toHaveLength(4);
     });
 
@@ -418,6 +425,13 @@ describe('modules/manager/terragrunt/extract', () => {
             depType: 'gitTags',
             packageName: 'ssh://git@mygit.com/hashicorp/example',
           },
+          {
+            currentValue: 'v1.0.4',
+            datasource: 'git-tags',
+            depName: 'mygit.com/hashicorp/example',
+            depType: 'gitTags',
+            packageName: 'ssh://git@mygit.com/hashicorp/example',
+          },
           {
             skipReason: 'no-source',
           },
@@ -466,7 +480,7 @@ describe('modules/manager/terragrunt/extract', () => {
           },
         ],
       });
-      expect(res?.deps).toHaveLength(35);
+      expect(res?.deps).toHaveLength(36);
       expect(res?.deps.filter((dep) => dep.skipReason)).toHaveLength(4);
     });
 
@@ -629,6 +643,13 @@ describe('modules/manager/terragrunt/extract', () => {
             depType: 'gitTags',
             packageName: 'ssh://git@mygit.com/hashicorp/example',
           },
+          {
+            currentValue: 'v1.0.4',
+            datasource: 'git-tags',
+            depName: 'mygit.com/hashicorp/example',
+            depType: 'gitTags',
+            packageName: 'ssh://git@mygit.com/hashicorp/example',
+          },
           {
             skipReason: 'no-source',
           },
@@ -677,7 +698,7 @@ describe('modules/manager/terragrunt/extract', () => {
           },
         ],
       });
-      expect(res?.deps).toHaveLength(35);
+      expect(res?.deps).toHaveLength(36);
       expect(res?.deps.filter((dep) => dep.skipReason)).toHaveLength(4);
     });
 
diff --git a/lib/modules/manager/terragrunt/modules.ts b/lib/modules/manager/terragrunt/modules.ts
index 0079b18581303b..8ffb23897bb078 100644
--- a/lib/modules/manager/terragrunt/modules.ts
+++ b/lib/modules/manager/terragrunt/modules.ts
@@ -87,7 +87,7 @@ export function analyseTerragruntModule(
     dep.datasource = detectGitTagDatasource(url);
     if (dep.datasource === GitTagsDatasource.id) {
       if (containsSubDirectory) {
-        dep.packageName = `${origin}${pathname.split('//')[0]}`;
+        dep.packageName = `${protocol}//${host}${pathname.split('//')[0]}`;
       } else {
         dep.packageName = url;
       }