`Commands.Fetch` could not resolve file based remote path

Reproduction steps

1. Create bare repository
2. Clone that
3. Try to fetch using Commands.Fetch

Expected behavior

Commands.Fetch should work as git fetch works

Actual behavior

failed to resolve path 'file://PAHT/TO/BARE/REPOSITORY': The filename, directory name, or volume label syntax is incorrect.

Version of LibGit2Sharp (release number or SHA1)

0.26.2

Operating system(s) tested; .NET runtime tested

Windows 10 x64 - .NET 6

首先，在 Windows 10 和 .NET 6 上使用 file:// remote 对 bare repository 执行 Commands.Fetch 来复现该问题，并将结果与 git fetch 进行比较。跟踪 Commands.Fetch 使用的路径解析入口点；当针对报告的 remote path 执行 fetch 时不再出现文件名或目录语法错误且成功完成，即表示完成。