tg-export: Ensure we don't overwrite a branch by git update-ref

diff --git a/tg-export.sh b/tg-export.sh
index 73ad2efde93508939db4e16b34cb4c9e407a127d..62361dd9b5abe721d2e5e1359df238798dcbcc54 100644 (file)
--- a/tg-export.sh
+++ b/tg-export.sh
@@ -190,7 +190,7 @@ recurse_deps driver "$name"
 
 
 if [ "$driver" = "collapse" ]; then
-       git update-ref "refs/heads/$output" "$(cat "$playground/$name")"
+       git update-ref "refs/heads/$output" "$(cat "$playground/$name")" ""
 
        depcount="$(cat "$playground/^ticker" | wc -l)"
        echo "Exported topic branch $name (total $depcount topics) to branch $output"