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New remote tag:

git tag -a TAGNAME -m "tag TAGNAME"
git push origin TAGNAME


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New remote branch:

git checkout -b BRANCHNAME
git push -u origin BRANCHNAME


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Download submodules:

git submodule update --init

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Refresh submodules:

git submodule update --recursive --remote

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Generate diff of specific commit

   git diff COMMIT^ COMMIT
(this generates diff between previous to COMMIT and COMMIT)
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https://help.github.com/articles/configuring-a-remote-for-a-fork/

git remote -v
git remote add upstream https://github.com/ChibiOS/ChibiOS.git
git remote -v

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https://help.github.com/articles/syncing-a-fork/


http://stackoverflow.com/questions/9646167/clean-up-a-fork-and-restart-it-from-the-upstream