Maven release plugin and git
===

We use git repository and maven release plugin. In the first build step, we pull all the changes to local repository, and in the next one we run `mvn release:prepare release:perform`. `release:prepare` updates workspace, updates version in pom files, creates tag in repository, runs all the tests, builds jars etc. If it's fine, it then pushes local repository changes to remote one (updated poms and tag). 

The problem is that when somebody pushes some changes meanwhile, push from maven fails. The error message is:

    error: failed to push some refs to 'http://<my_repository>'
    To prevent you from losing history, non-fast-forward updates were rejected
    Merge the remote changes before pushing again.  See the 'Note about
    fast-forwards' section of 'git push --help' for details.

Did somebody have similar problem? How to solve it?