# results that don't differ between the two trees.
if ! test -d "$tmp/worktree"
then
- git worktree add --detach "$tmp/worktree" "$from" &&
+ git worktree add -f --detach "$tmp/worktree" "$from" &&
dots=$(echo "$tmp/worktree" | sed 's#[^/]*#..#g') &&
ln -s "$dots/config.mak" "$tmp/worktree/config.mak"
fi