Quoting Leo Famulari (2016-07-10 19:16:30)
> On Sun, Jul 10, 2016 at 05:54:38PM -0400, Troy Sankey wrote:
> > When hashing git checkouts of packages, packagers must first remove the .git
> > directory.  This commit adds this clarification to the "Invoking guix hash"
> > page in the documentation.
> 
> Yes! This is one that *everybody* has to ask.

I've asked it, and I've since seen two more ask on IRC :)

> I think it would be better in section '5.1.2 origin reference', because
> that is where the origin methods (url-fetch, git-fetch, etc) and the
> sha256 field are documented.
> 
> In that case, it could go along with explanations of how to calculate
> the hash for cvs-download, hg-download, and svn-download.
> 
> What do others think?

I think what is really missing is a reference to 'Invoking guix hash' from
'5.1.2 origin reference'.  My new patch includes that reference, along with
your other suggested explainations about other VCS.  I think it is important
that we direct people to the right tools for the job---beginning packagers
should not yet be concerned about the specifics of using 'guix hash' before
they learn the name of the tool.

Troy