git help - connect to my teamviewer now

I am having git issues and need someone to connect via teamviewer to help me resolve them.

A previous developer fking broke everything.

Made changes to code but made a mess of pushing/pulling to repos.

Now I am facing issues trying to update some HTML.

for example:

[centosmail public_html]$ git push
warning: push.default is unset; its implicit value is changing in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the current behavior after the default changes, use:

git config --global push.default matching

To squelch this message and adopt the new behavior now, use:

git config --global push.default simple

See 'git help config' and search for 'push.default' for further information.
(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode
'current' instead of 'simple' if you sometimes use older versions of Git)

To ssh://axxxsource.developers.google.com:2022/p/xxxx/r/Frontend
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to 'ssh://xxxxxusource.developers.google.com:2022/p/xxxxx/r/Frontend'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Merge the remote changes (e.g. 'git pull')
hint: before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.