release number when upstream *only* has git hashes?

[Eric Smith]

I wrote:
> What should I use for the release number in a spec when upstream does 
> not have releases, and *only* has git hashes?  It's not a prerelease 
> since it is not clear that there will ever be any official release.

I meant "version number", not "release number".  I imagine that the 
release number should still be 0.1.<yyyymmdd>git<hashprefix>.  Or for 
this case, should the date and git hash go into the version?

Thanks,
Eric