ls-remote doc: explain what each example does

While it's good to have several examples to solidify the output pattern
and generally demonstrate how to use the command, most other EXAMPLES
sections (e.g., git-show-branch.txt, git-remote.txt) additionally
describe the problem/situation to which the example is applicable.

Follow this example in the ls-remote documentation.

Signed-off-by: Sean Allred <allred.sean@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: vermiculus

Documentation/git-ls-remote.txt

@@ -99,13 +99,18 @@ OPTIONS
 EXAMPLES
 --------
 
+* List all references matching given patterns:
++
 ----
 $ git ls-remote http://www.kernel.org/pub/scm/git/git.git master seen rc
 5fe978a5381f1fbad26a80e682ddd2a401966740	refs/heads/master
 c781a84b5204fb294c9ccc79f8b3baceeb32c061	refs/heads/seen
+----
 
-$ git remote add korg http://www.kernel.org/pub/scm/git/git.git
-$ git ls-remote --tags korg v\*
+* List only tags matching a given wildcard pattern:
++
+----
+$ git ls-remote --tags http://www.kernel.org/pub/scm/git/git.git v\*
 485a869c64a68cc5795dd99689797c5900f4716d	refs/tags/v2.39.2
 cbf04937d5b9fcf0a76c28f69e6294e9e3ecd7e6	refs/tags/v2.39.2^{}
 d4ca2e3147b409459955613c152220f4db848ee1	refs/tags/v2.40.0