diff --git a/pre-build.sh b/pre-build.sh
new file mode 100755
index 0000000..02afe80
--- /dev/null
+++ b/pre-build.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -x
+echo "Start pre-build"
+# export GIT_SSH_COMMAND="${GIT_SSH_COMMAND} -A"
+export GIT_SSH_COMMAND="ssh -A"
+echo $SSH_AUTH_SOCK
+git submodule init
+git submodule update --remote
\ No newline at end of file