Updating -gretl- has gone well, so far. But is this normal?

clive@clivubu:~/gretl-git$ sudo git config --global push.default simple
clive@clivubu:~/gretl-git$ sudo git pull         
Already up-to-date.
clive@clivubu:~/gretl-git$ sudo git commit -a    
On branch master
Your branch is up-to-date with 'origin/master'.
Untracked files:
        Makefile
        build.h
        builddate
        cli/.deps/
        cli/.libs/
        cli/Makefile
        cli/complete.o
        cli/debug
        cli/gretlcli
        cli/gretlcli.o
        config.h
        config.log
        config.status
        doc/Makefile
        doc/commands/.libs/
        doc/commands/Makefile
        doc/commands/bbl2txt
        doc/commands/cmdtex

        [...]

        tests/Makefile
        utils/emacs/Makefile
        xdg/Makefile
        xdg/gretl.desktop

nothing added to commit but untracked files present
clive@clivubu:~/gretl-git$ sudo git push
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.