magic syntax for most recent git from sourceforge?

[Gary Aitken]

Can anyone give me the magic formula for fetching the most recent git
distro from sourceforge for a ports Makefile?

The porter's handbook talks about how to fetch git repos from github
but not about how to get them from sourceforge.

I've tried a few things but can't get the right combo of MASTER_SITES
and PORTNAME, DISTFILE, and DISTVERSION

The git clone cmd is:
   git clone https://git.code.sf.net/p/nufraw/git nufraw-git

This particular git version says it is 0.41 but attempting to fetch
with from
   PORTVERSION=    0.41
   MASTER_SITES=   https://sourceforge.net/projects/nufraw/files/latest/
doesn't work; PORTVERSION=  0.40 does.
I've also tried with
   DISTVERSION=    07ebb73a
with no joy.

Thanks,

Gary