This package will install Git 2.4.2 from source.
install.sh pkgsh/git-2.4.2
or
sh <(curl -sL http://install.opensource.sh/pkgsh/git-2.4.2)
Fork the pkgsh/git-2.4.2 repo on GitHub, make changes, fix bugs, add compatibilities or make something cool and after that just send a Pull Request. :)