I notice that in several places the notation "git pull(1)" is used, which I do not understand. It makes me think of either a label or a footnote, but I can see no previous introduction of a label, nor a footnote at the end of the answer.

Is there some other meaning to the "(1)"? If so could this meaning be defined in the answer for people like me who are unfamiliar with it?

Sure. It's Unix notation for commands that have a manual page.

See this extract from the intro(1) manual page (the first page of the Linux programmer's manual):

$ MANWIDTH=72 man intro | sed -n '/Getting information/,+12p'
   Getting information
     There are thousands of commands, each with many  options.   Tradi‐
     tionally commands are documented on man pages, (like this one), so
     that  the  command "man kill" will document the use of the command
     "kill" (and "man man" document the command  "man").   The  program
     man  sends  the  text  through  some pager, usually less.  Hit the
     space bar to get the next page, hit q to quit.

     In documentation it is customary to refer to man pages  by  giving
     the  name  and section number, as in man(1).  Man pages are terse,
     and allow you to find quickly some forgotten detail.  For  newcom‐
     ers  an  introductory  text with more examples and explanations is
     useful.

git-pull(1) basically means that you can run man 1 git-pull

Thanks for explaining. I would not expect everyone who has a use for git to also have sufficient Unix knowledge to know why a command is postfixed "(1)", so I'd recommend mentioning this in the answer (perhaps in a footnote), rather than just in one of the comment threads.

The notation makes sense in the context of a man page. Outside that context, numbers in parentheses are used with many other meanings, so using the notation without mentioning why is likely to lead to confusion for some readers (such as me).

I think the comment should be enough. It's common to explain these details in comments. :)

It is actually common in Unix contexts to use this notation, BTW, even outside of manual pages. Hopefully, using it more will make people more used to it.

IMO in this context it's okay to assume the reader has heard of man pages, and even noticed the common idiom of identifying programs according to the title of their manual section. It makes no difference to say "git-pull(1)" or git pull.

That said, since you used git pull in your question, you might as well be consistent and use that in the answer.

I originally wrote git-pull(1) in the title too, but thought that it might cause confusion in the title, so I changed it to git pull in the title but kept git-pull in the text. :)

In running text, when I mean exactly git pull (with no flags), I use that. When I mean the command, with any optional flags, I say git-pull(1).