catkin_prepare_release --bump minor fails

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Currently, I'm trying to release my package for the first time using bloom.

I followed this guide http://wiki.ros.org/bloom . I indexed my package in /kinetic/distribution.yaml (firstly, on master branch), that passed. After that, I made pre-release tests and run ./prerelease.sh command at the end. Until now, everything is fine, I didn't met any fail.

After that, I generated CHANGELOG.rst by running; $ catkin_generate_changelog

As stated here (go to Step 2.1), I changed the CHANGELOG.rst and made the version 0.0.1. After that, I commit my changelog as;

But now I'm getting this error when I running $ catkin_prepare_release --bump minor;

Prepare the source repository for a release.
Repository type: git
Found packages: indoor_localization
Prepare release of version '0.1.0' [Y/n]?y
Trying to push to remote repository (dry run)...

Could not determine git remote: Command '['/usr/bin/git', 'config', '--get', u'branch.master.remote']' returned non-zero exit status 1

May be the branch 'master' is not tracking a remote branch?

I am very newbie in Git. What should I do? Thanks.