Also, the native Windows git is still your best bet for git operations. That's one of the cases where I will have a PowerShell and an Ubuntu bash window side-by-side, working in the same /mnt/d/... | D:\... directory. git operations in PowerShell and Jekyll (or whatever) operations in Ubuntu bash.
Also, they _really_ chose a poor name for that executable; it should have been wsl.exe or some such, not bash.exe. At least lxss.exe isn't already in use by other software in my path...
Also, totally fair feedback about the naming. In FCU, we added wsl.exe in addition to bash.exe. It launches into your default shell rather than /bin/bash.
[1] https://github.com/Microsoft/WSL/issues/2715
* I work at Microsoft on WSL
https://docs.microsoft.com/en-us/windows/wsl/interop
Calling Windows EXEs from bash will automatically retain the current working directory under /mnt/c/*, so it should just work out of the box. Looks like you might be able to get away with just adding native Windows git to your bash path.