Using Git Locally then merging and checking into StarTeam

My client currently requires us to use StarTeam for checking in our code changes. I would like to pull all the code down from StarTeam and setup a local Git repository so that I might take advantages of the branching to work on some upgrades of some JQuery modules. Does anyone have any suggestions 开发者_如何学Goor advice on using a local Git Repository then checking in changes to a StarTeam server?

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I would go a bit like git-svn does that kind of workflow:

• import in a Git repo, in the master branch
• make all the branches from there, but never committing anything to master
• make all the merges between branches other than master (again, the master branch is supposed to reflect the StartTeam server latest import)
• when ready to go back to StartTeam:
  • first update master (with the latest from StartTeam)
  • then merge my work back to the master branch
  • use the content of that master branch as a source to reimport in StartTeam (meaning at this point, master will again represents StarTeam content)