git

git fetch upstream
git checkout master
git merge upstream/master
git push origin master

https://ardalis.com/syncing-a-fork-of-a-github-repository-with-upstream

https://help.github.com/en/github/collaborating-with-issues-and-pull-re…

http://rogerdudler.github.io/git-guide/
https://try.github.io
http://sixrevisions.com/resources/git-tutorials-beginners/

code - diretoria existente
temp - diretoria temporaria

git clone https://myrepo.com/git.git temp
mv temp/.git code/.git
rm -rf temp


http://stackoverflow.com/questions/5377960/whats-the-best-practice-to-g…

$ git clone git://github.com/Benjamin-Dobell/Heimdall.git
$ mkdir -p Heimdall/build
$ cd Heimdall/build
$ cmake -DCMAKE_BUILD_TYPE=Release ..
$ make
$ sudo cp bin/* /usr/local/bin

https://wiki.cyanogenmod.org/w/Install_and_compile_Heimdall