Merge branch 'jk/fetch-follow-remote-head-fix'

"git fetch [<remote>]" with only the configured fetch refspec should be the only thing to update refs/remotes/<remote>/HEAD, but the code was overly eager to do so in other cases. * jk/fetch-follow-remote-head-fix: fetch: make set_head() call easier to read fetch: don't ask for remote HEAD if followRemoteHEAD is "never" fetch: only respect followRemoteHEAD with configured refspecs