diff --git a/lib/build.sh b/lib/build.sh
index 9ad74ec..5ccc536 100755
--- a/lib/build.sh
+++ b/lib/build.sh
@@ -25,6 +25,11 @@ fi
 if ! [[ "$ref" =~ ^refs/ ]] ; then
     ref=refs/heads/$ref
 fi
+for retry in 1 2 3 ; do
+    timeout 15m git fetch --update-head-ok origin +$ref:$ref && break
+    echo "Retry git fetch in 60 seconds"
+    sleep 60
+done
 git fetch --update-head-ok origin +$ref:$ref
 git switch --force-create $v $ref