git diff-files --name-only | git update-index --remove --stdin &&
work=`git write-tree` &&
git read-tree --reset -u $new &&
- git read-tree -m -u --aggressive --exclude-per-directory=.gitignore $old $new $work ||
- exit
+ eval GITHEAD_$new=${new_name:-${branch:-$new}} GITHEAD_$work=local &&
+ export GITHEAD_$new GITHEAD_$work &&
+ git merge-recursive $old -- $new $work || exit
if result=`git write-tree 2>/dev/null`
then