Fix branch path

publish_images.py

@@ -11,7 +11,7 @@ IS_TEST_BRANCH = '-t' in sys.argv
 def get_changed_dockerfiles(vs_master=False):
     """Checks the last Git commit and returns a list of changed Dockefiles"""
     if vs_master:
-        diff_cmd = "git --no-pager diff --name-only master"
+        diff_cmd = "git --no-pager diff --name-only origin/master"
     else:
         diff_cmd = "git diff-tree --no-commit-id --name-only -r HEAD"
     child = sp.Popen(diff_cmd, shell=True, stdout=sp.PIPE, stderr=sp.PIPE)