Does not work on symlinked files unless in actual .git directory

[erikr]

Overview

This plugin fails on symlinked files. It only works if the user opens the file from the original directory that contains .git.

Error message

E605: Exception not caught: The remote: zsh:1: no matches found: (or any of the parent directo
ries): has not been recognized as belonging to one of the supported git hosing environments: G
itHub, GitLab, BitBucket, Cgit

Steps to reproduce

• Git directory is /foo and file inside is /foo/bar.py.
• Symlink to /foo/bar.py, e.g. ln -s /foo/bar.py ~/bar.py.
• Open the symlinked file in vim a directory other than /foo, e.g.

  cd ~
  vim ~/bar.py

• Run <leader>gh.

Proposed fix

TBD