I have the following git remotes locally:

> git remote -v
origin	git@github.com:kevinAlbs/mongo-c-driver.git (fetch)
origin	git@github.com:kevinAlbs/mongo-c-driver.git (push)
upstream	git@github.com:mongodb/mongo-c-driver.git (fetch)
upstream	git@github.com:mongodb/mongo-c-driver.git (push)

So "origin" is my fork, and "upstream" is mongodb/mongo-c-driver. When I run calc_release_version.py on the master branch, the script inspects the output of "git show-ref" and looks for refs from origin. But my fork does not have the latest tags, so I get the wrong result.

Perhaps calc_release_version.py should inspect the remotes and match on whichever refers to mongodb/mongo-c-driver.