diff --git a/jenkins/Jenkinsfile.ai-game-creator-shell-build b/jenkins/Jenkinsfile.ai-game-creator-shell-build
index 0619ec54e..bfbe19901 100644
--- a/jenkins/Jenkinsfile.ai-game-creator-shell-build
+++ b/jenkins/Jenkinsfile.ai-game-creator-shell-build
@@ -28,40 +28,40 @@ pipeline {
   stages {
     stage('Checkout') {
       steps {
-        withEnv(["PATH=${env.AGC_WINDOWS_PATH}"]) {
-          checkout([
-            $class: 'GitSCM',
-            branches: [[name: "*/${params.SOURCE_BRANCH}"]],
-            doGenerateSubmoduleConfigurations: false,
-            extensions: [
-              [$class: 'CleanBeforeCheckout'],
-              [$class: 'CloneOption', shallow: false, noTags: false, timeout: 30],
-            ],
-            userRemoteConfigs: [[
-              url: env.GIT_REMOTE_URL,
-              credentialsId: env.GIT_REMOTE_CREDENTIAL_ID,
-              refspec: "+refs/heads/${params.SOURCE_BRANCH}:refs/remotes/origin/${params.SOURCE_BRANCH}",
-            ]],
-          ])
+        sshagent(credentials: [env.GIT_REMOTE_CREDENTIAL_ID]) {
           powershell '''
             $ErrorActionPreference = 'Stop'
+            $git = 'C:\\Tools\\Git\\cmd\\git.exe'
+            if (-not (Test-Path $git)) { throw "找不到 Git: $git" }
+            if (Test-Path '.git') {
+              & $git fetch --tags --force --prune origin "+refs/heads/$($env:SOURCE_BRANCH):refs/remotes/origin/$($env:SOURCE_BRANCH)"
+              if ($LASTEXITCODE -ne 0) { throw 'Git fetch 失败' }
+              & $git clean -fdx
+              & $git reset --hard "origin/$($env:SOURCE_BRANCH)"
+            } else {
+              & $git clone --no-single-branch $env:GIT_REMOTE_URL .
+              if ($LASTEXITCODE -ne 0) { throw 'Git clone 失败' }
+              & $git fetch --tags --force origin "refs/heads/$($env:SOURCE_BRANCH):refs/remotes/origin/$($env:SOURCE_BRANCH)"
+              if ($LASTEXITCODE -ne 0) { throw 'Git fetch 分支失败' }
+              & $git checkout --detach "origin/$($env:SOURCE_BRANCH)"
+            }
             $commit = $env:COMMIT_HASH.Trim()
             if ($commit) {
               if ($commit -notmatch '^[0-9a-fA-F]{7,64}$') {
                 throw 'COMMIT_HASH 必须是 7-64 位十六进制 Git commit。'
               }
-              git cat-file -e "${commit}^{commit}"
+              & $git cat-file -e "${commit}^{commit}"
               if ($LASTEXITCODE -ne 0) {
                 throw "COMMIT_HASH 不存在: $commit"
               }
               $branchRef = "refs/remotes/origin/$($env:SOURCE_BRANCH)"
-              git merge-base --is-ancestor $commit $branchRef
+              & $git merge-base --is-ancestor $commit $branchRef
               if ($LASTEXITCODE -ne 0) {
                 throw "COMMIT_HASH 不属于 SOURCE_BRANCH: $($env:SOURCE_BRANCH)"
               }
-              git checkout --detach $commit
+              & $git checkout --detach $commit
             }
-            $resolved = (git rev-parse HEAD).Trim()
+            $resolved = (& $git rev-parse HEAD).Trim()
             Set-Content -Path '.jenkins-source-commit' -Value $resolved -NoNewline
             Write-Host "源码 commit=$resolved"
           '''