git push rejected: error: failed to push some refs

git push -f if you have permission, but that will screw up anyone else who pulls from that repo, so be careful.

If that is denied, and you have access to the server, as canzar says below, you can allow this on the server with

git config receive.denyNonFastForwards false

If you are the only the person working on the project, what you can do is:

 git checkout master
 git push origin +HEAD

This will set the tip of origin/master to the same commit as master (and so delete the commits between 41651df and origin/master)

Just do

git pull origin [branch]

and then you should be able to push.

If you have commits on your own and didnt push it the branch yet, try

git pull --rebase origin [branch]

and then you should be able to push.