Merge branch 'jc/set-head-symref-fix'

"git fetch" from a configured remote learned to update a missing
remote-tracking HEAD but it asked the remote about their HEAD even
when it did not need to, which has been corrected.  Incidentally,
this also corrects "git fetch --tags $URL" which was broken by the
new feature in an unspecified way.

* jc/set-head-symref-fix:
  fetch: do not ask for HEAD unnecessarily

diff --cc builtin/fetch.c
Simple merge

diff --cc t/t5510-fetch.sh
Simple merge