When starting a branch, branch.merge is set to project revision unless
the revision is a SHA1. In that case, branch.merge is set to dest_branch
if defined or manifest default revision otherwise. This special handling
allows repo upload to work when the project revision is a SHA1.
Extend the special handling to also happen when the project revision
is a tag value or a change value so that repo upload will work in those
case as well.
Change-Id: Iff81ece40e770cd02535e80dcb023564d42dcf47
Repo is a tool built on top of Git. Repo helps manage many Git repositories,
does the uploads to revision control systems, and automates parts of the
development workflow. Repo is not meant to replace Git, only to make it
easier to work with Git. The repo command is an executable Python script
that you can put anywhere in your path.