git <tag> --fubar

[Dicebot via Digitalmars-d]

Ah I see. Your tag references "merged commit" but not "merge 
commit", former being implicit part of the latter when it comes 
to "git describe".

Printing HEAD for 2.066 shows this:

commit 2b795569cd892801050faec80054d91c1fb54d3c
Merge: d84aadd 601d478

As you may notice it mentions d84aadd (your v2.066-b3 tag commit) 
as on of merged parents.


May I ask what command sequence have you used to create the tag? 
Doing this locally result in proper HEAD tag for me:

git fetch upstream
git checkout 2.066
git tag testtag HEAD