Update

execute.py

@@ -11,6 +11,7 @@ INPUT_TOKEN = os.getenv('INPUT_TOKEN')
 GITHUB_SERVER_URL = os.getenv('GITHUB_SERVER_URL')
 GITHUB_REPOSITORY = os.getenv('GITHUB_REPOSITORY')
 GITHUB_REF = os.getenv('GITHUB_REF')
+GITHUB_ACTION_REF = os.getenv('GITHUB_ACTION_REF')
 
 def escape(text):
     return '"' + text + '"'
@@ -52,7 +53,7 @@ cmd = 'git fetch --progress --depth 1 origin ' + GITHUB_REF
 result = os.popen(cmd)
 print(result.read())
 
-cmd = 'git checkout ' + GITHUB_REF
+cmd = 'git checkout ' + GITHUB_ACTION_REF
 result = os.popen(cmd)
 print(result.read())