diff --git a/git-repo.sh b/git-repo.sh
new file mode 100755
index 0000000..899670b
--- /dev/null
+++ b/git-repo.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+UPSTREAM=${TUNASYNC_UPSTREAM_URL:-"https://gerrit.googlesource.com/git-repo"}
+
+function repo_init() {
+	git clone --mirror $UPSTREAM $TUNASYNC_WORKING_DIR
+}
+
+function update_repo_git() {
+	cd $TUNASYNC_WORKING_DIR
+	echo "==== SYNC repo.git START ===="
+	/usr/bin/timeout -s INT 3600 git remote -v update
+	git repack -a -b -d
+	echo "==== SYNC repo.git DONE ===="
+}
+
+if [[ ! -f "$TUNASYNC_WORKING_DIR/HEAD" ]]; then
+	echo "Initializing repo.git mirror"
+	repo_init
+fi
+
+update_repo_git