[tbb-bugs] #23630 [Applications/Tor Browser]: Clarify README.HACKING

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#23630: Clarify README.HACKING
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 Reporter:  tom                       |          Owner:  tbb-team
     Type:  enhancement               |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-rbm                   |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by boklm):

 The value of `git_hash` has to be a tag if `tag_gpg_id` is set to 1.
 Otherwise it can be anything that is understood by git, including a
 branch. If you specify a branch, you don't need to specify a remotename,
 as all branches from the `git_url` are created as local branches (with
 `git fetch origin +refs/heads/*:refs/heads/*`). So it is not a good idea
 to create local branches in git_clones/* as they can be removed if the
 remote repository has a branch with the same name. If you want to use
 local branches, it is better to create them in a separate repository, and
 change `git_url` to `file:///path` to point to your repository.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23630#comment:2>
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