[MRELEASE-1070] Creating branch from a tag

**[Peter Kronenberg](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=peterkronenberg)** opened **[MRELEASE-1070](https://issues.apache.org/jira/browse/MRELEASE-1070?redirect=false)** and commented

What is the correct process for using `release:branch` to create a branch from a tag in order to create a Hotfix?  If I just checkout the tag, the plugin complains because I have a detached Head.  If I checkout the tag with a temporary branch name, then the plugin creates my new branch, but it also commits changes to my temp branch, which I really just want to delete

I'm using a command line like this

`mvn release:branch -DbranchName="peter-test-90.90.90-SNAPSHOT" -DupdateBranchVersions=true -DupdateWorkingCopyVersions=false -DreleaseVersion="90.90.90-SNAPSHOT"`

Is there a way I can just tell it which tag that I want to create a branch off of?

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No further details from [MRELEASE-1070](https://issues.apache.org/jira/browse/MRELEASE-1070?redirect=false)

Start at the Maven `release:branch` command and reproduce the reported detached-HEAD and temporary-branch cases using the command shown. Trace how the command selects its starting tag and updates branches; done means a branch can be created from a specified tag without requiring or modifying a temporary branch.

Written by the indexing model from the issue text.