"$head")
        echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $merge)"
        git read-tree -u -m $head $merge || exit 1
-       git update-ref -m "resolve $merge_name: Fast forward" \
+       git update-ref -m "resolve $merge_name: Fast-forward" \
                HEAD "$merge" "$head"
        git diff-tree -p $head $merge | git apply --stat
        dropheads