Linux Shell Scripting Cookbook - Third Edition

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A tag can be used as an identifier to create a fork or branch:

    $ fossil add tag newTag trunk
    $ fossil branch new newTagBranch newTag
    $ fossil checkout newTagBranch

A tag can create a branch with a commit and the -branch option:

    $ fossil add tag myNewTag 2016-12-21
    $ fossil checkout myNewTag
    # edit and change
    $ fossil commit -branch myNewTag