git meta push doesn't work with local filesystem

```
git init foo
git init bar
cd foo
touch .gitmodules
git add .gitmodules
git commit -m 'first commit'
git meta push ../bar HEAD:refs/heads/tmp
```

Expected: (try running with "meta" to find this output)
```
Enumerating objects: 3, done.
Counting objects: 100% (3/3), done.
Writing objects: 100% (3/3), 214 bytes | 214.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To ../bar
* [new branch] HEAD -> tmp
```

Actual:
```
[master (root-commit) 0000000] first commit
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 .gitmodules
No remote named ../bar.
```