The previous two steps were meant to stop updating the explicit
refname the user gave to the command to a different ref that points
at it. Most notably, we no longer substitute a branch name the user
used with a name of the tag that points at the commit at the tip of
the branch (it still can be done with "local-branch:remote-tag").
However, they also lost the code that included the message in a
tag when the user _did_ ask the tag to be pulled. Resurrect it.