git-switch(1) then git-pull(1)

I'm confused.

If a switch is intended to update things, then how can an immediately 
subsequent pull lead to updates?


% git -C /usr/ports switch main && git -C /usr/src switch main
Already on 'main'
Your branch is up to date with 'freebsd/main'.
M       sys/netgraph/bluetooth/hci/ng_hci_cmds.c
M       sys/netgraph/bluetooth/hci/ng_hci_evnt.c
M       sys/netgraph/bluetooth/include/ng_hci.h
Already on 'main'
Your branch is up to date with 'origin/main'.
% git -C /usr/ports pull --ff-only && git -C /usr/src pull --ff-only
remote: Enumerating objects: 3284, done.
remote: Counting objects: 100% (840/840), done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 3284 (delta 837), reused 837 (delta 837), pack-reused 2444
Receiving objects: 100% (3284/3284), 1.92 MiB | 1.11 MiB/s, done.
Resolving deltas: 100% (1985/1985), completed with 474 local objects.
 From https://git.freebsd.org/ports
    fb6a9af3e898..80afc63eeb99  main       -> freebsd/main
    749ca3ec2e60..c3552efe398e  2022Q4     -> freebsd/2022Q4
Updating fb6a9af3e898..80afc63eeb99
^C
% cat /usr/ports/.git/config
[core]
         repositoryformatversion = 0
         filemode = true
         bare = false
         logallrefupdates = true
[remote "freebsd"]
         url = https://git.freebsd.org/ports.git
         fetch = +refs/heads/*:refs/remotes/freebsd/*
[branch "main"]
         remote = freebsd
         merge = refs/heads/main
%

Git - git-switch Documentation <https://git-scm.com/docs/git-switch>