git problems and resolutions

git-tip.txt

fatal: unable to connect to git.qemu-project.org:
git.qemu-project.org[0: (my ip address)]: errno=Connection refused
firewall may be blocking outbound git:// protocol

override with a variety of scopes:
git config --global url."https://".insteadOf                           git://
git config --global url.https://github.com/.insteadOf                  git://github.com/
git config --global url.https://git.qemu.org/git/.insteadOf            git://git.qemu-project.org/
git config --global url.https://anongit.freedesktop.org/git/.insteadOf git://anongit.freedesktop.org/

git config --global url.https://github.com/riscv.insteadOf             git://github.com/riscv

example to clear:

git config --global --unset url.https://github.com/.insteadOf
============================================================================================================
git problem: Updates were rejected because the tip of your current branch is behind

git push
To <url>.git
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to '<url>.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.

solution: git pull --rebase <url>