Merge branch 'jc/checkout-detach-wo-tracking-report'

"git checkout/switch --detach foo", after switching to the detached
HEAD state, gave the tracking information for the 'foo' branch,
which was pointless.

Tested-by: M Hickford <mirth.hickford@gmail.com>
cf. <CAGJzqsmE9FDEBn=u3ge4LA3ha4fDbm4OWiuUbMaztwjELBd7ug@mail.gmail.com>

* jc/checkout-detach-wo-tracking-report:
  checkout: omit "tracking" information on a detached HEAD

builtin/checkout.c

@@ -1035,7 +1035,8 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 	remove_branch_state(the_repository, !opts->quiet);
 	strbuf_release(&msg);
 	if (!opts->quiet &&
-	    (new_branch_info->path || (!opts->force_detach && !strcmp(new_branch_info->name, "HEAD"))))
+	    !opts->force_detach &&
+	    (new_branch_info->path || !strcmp(new_branch_info->name, "HEAD")))
 		report_tracking(new_branch_info);
 }
 

t/t2020-checkout-detach.sh

@@ -176,7 +176,10 @@ test_expect_success 'tracking count is accurate after orphan check' '
 	git config branch.child.merge refs/heads/main &&
 	git checkout child^ &&
 	git checkout child >stdout &&
-	test_cmp expect stdout
+	test_cmp expect stdout &&
+
+	git checkout --detach child >stdout &&
+	test_grep ! "can be fast-forwarded\." stdout
 '
 
 test_expect_success 'no advice given for explicit detached head state' '