I have so far only seen this behavior with 'git fetch' command, but it might be more general depending on how command line parsing is implemented.
In a Bash script I had something similar to (but more complicated than what I show below)
git fetch "${force}"where $force is either an empty string or '--force'. Due to that you usually want to expand all variables within double quotes when writing Bash scripts I did not realize that I had made a mistake here. Instead I got this strange error message and spent a couple of hours chasing it
fatal: no path specified; see 'git help pull' for valid url syntax
This problem eventually turned out to be of the trivial kind once I realized why I got it, and also very simple to reproduce. Just do
$ git fetch ""
fatal: no path specified; see 'git help pull' for valid url syntax
$
That is, 'git fetch' does not check if the given string is an empty string before writing the error message. The empty string is completely unrelated to any path/URI and in this case it was not that helpful.
What do you say? Wouldn't it be better with a more specific error message when an option value/argument is an empty string? Or should perhaps empty strings be ignored by the git commands?
/John