"git checkout" resets modified files

"git checkout" resets modified files

Version git  2.5.0,

Description: I was automating a process that would pull and switch to another branch when I stumbled across this. I have not been able to emulate this from command line but using go (or I imagine other languages are similar) if you execute a command like

exec.Command("git","checkout","")

A checkout with the branch parameter but the branch parameter is empty.

The result is git resets the the repository, modified files are reset back to original state without warning.

I would expect the behavior should be the same as a "git checkout" command

Has anyone else seen something like this ? For myself the solution was to simply suppress passing in the revision as a third argument if the revision was empty. But this does appear to be an off behavior.

Thanks Nz