GV doesn't seem to work with worktrees

I'm getting this message when I try this on a [git worktree](https://git-scm.com/docs/git-worktree)
```
Error detected while processing function 39_gv[13]..54_repo_tree[3]..54_throw:
line 1:
E605: Exception not caught: fugitive: no work tree
Error detected while processing function 39_gv[13]..54_repo_tree:
line 3:
E171: Missing :endif
```

Is this expected? Am I doing something wrong?

I'm on commit:
```
○ → git describe --all --long HEAD
heads/master-0-g72dc64d
```