Currently a Bamboo build cannot access the metadata contained within the push payload of a commit that triggers a Bamboo build. This data contains everything from author and timestamp to revision number as well as other things that may want to be consumed/action upon in the process of a Bamboo build.

Customer Comment:

There are multiple reasons we need to process the push-payload....

• Identify when a commit was pushed to a particular branch (in our case
  'release') on any one of our repositories
• Identify when a commit was pushed without a valid JIRA issue ID
  mentioned in the commit message
• Update the associated JIRA issues (after scraping the JIRA id from the
  commit message) with the branch it was pushed to

In general features like this can improve release management within Bamboo when it's not linked to an external system that manages releases (such as JIRA).