git rejected push non-fast-forward

Question

I am quite new to git, and I had been working on a small side project for the last 2 months and had been pushing stuff onto bitbucket with no problems. A couple of days ago,

Answer 1

Try doing

git pull origin master
git add -A
git commit -m "modified code"
git push origin master

Your local repository is likely out of sync with the remote repository.