! [rejected] master -> master (non-fast-forward) error: failed to push some refs to 'https://github.com/kaoti/m_FPCGH.git' code example

Example 1: rejected master -> master (non-fast-forward)

# if you updated your files on github.com so may be thats its asking first pull
# request then your push the request.
# so Very simple first:
# not use -f 
git pull origin master
# then
git push origin master

Example 2: rejected master -> master (non-fast-forward)

git push -f origin master !!This is never a recommended use of git. This will overwrite changes on the remote. Only do this if you know 100% that your local changes should be pushed to the remote master.

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