diff --git a/app/Models/Application.php b/app/Models/Application.php
index a4f51780e..8d5024b46 100644
--- a/app/Models/Application.php
+++ b/app/Models/Application.php
@@ -1093,6 +1093,14 @@ class Application extends BaseModel
         $escapedBaseDir = escapeshellarg($baseDir);
         $isShallowCloneEnabled = $this->settings?->is_git_shallow_clone_enabled ?? false;
 
+        // For deploy_key (e.g. Gitea with custom port), fetch/submodule/lfs must use same SSH port as clone
+        if ($this->deploymentType() === 'deploy_key') {
+            ['port' => $customPort] = $this->customRepository();
+            $git_ssh_followup = "ssh -p {$customPort} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null";
+        } else {
+            $git_ssh_followup = 'ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null';
+        }
+
         // Use the explicitly passed commit (e.g. from rollback), falling back to the application's git_commit_sha.
         // Invalid refs will cause the git checkout/fetch command to fail on the remote server.
         $commitToUse = $commit ?? $this->git_commit_sha;
@@ -1102,9 +1110,9 @@ class Application extends BaseModel
             // If shallow clone is enabled and we need a specific commit,
             // we need to fetch that specific commit with depth=1
             if ($isShallowCloneEnabled) {
-                $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null\" git fetch --depth=1 origin {$escapedCommit} && git -c advice.detachedHead=false checkout {$escapedCommit} >/dev/null 2>&1";
+                $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"{$git_ssh_followup}\" git fetch --depth=1 origin {$escapedCommit} && git -c advice.detachedHead=false checkout {$escapedCommit} >/dev/null 2>&1";
             } else {
-                $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null\" git -c advice.detachedHead=false checkout {$escapedCommit} >/dev/null 2>&1";
+                $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"{$git_ssh_followup}\" git -c advice.detachedHead=false checkout {$escapedCommit} >/dev/null 2>&1";
             }
         }
         if ($this->settings->is_git_submodules_enabled) {
@@ -1115,10 +1123,10 @@ class Application extends BaseModel
             }
             // Add shallow submodules flag if shallow clone is enabled
             $submoduleFlags = $isShallowCloneEnabled ? '--depth=1' : '';
-            $git_clone_command = "{$git_clone_command} git submodule sync && GIT_SSH_COMMAND=\"ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null\" git submodule update --init --recursive {$submoduleFlags}; fi";
+            $git_clone_command = "{$git_clone_command} git submodule sync && GIT_SSH_COMMAND=\"{$git_ssh_followup}\" git submodule update --init --recursive {$submoduleFlags}; fi";
         }
         if ($this->settings->is_git_lfs_enabled) {
-            $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null\" git lfs pull";
+            $git_clone_command = "{$git_clone_command} && cd {$escapedBaseDir} && GIT_SSH_COMMAND=\"{$git_ssh_followup}\" git lfs pull";
         }
 
         return $git_clone_command;