Making a portable Git - git-for-windows/git GitHub Wiki

As the portable Git is made by putting together files from the Git SDK, it is advisable to update those files first. To update the packages, call pacman -Syu (caveats apply). If you want to test Git changes or make an portable Git from your own Git fork, you need to call cd /usr/src/git && make install (for documentation changes, make install-html and afterwards prefix=/mingw64 make -C contrib/subtree install-html - without the second make you get a error message about a missing git-subtree.html file).

To package the portable Git, install the SDK, run it and then issue the following commands:

cd /usr/src/build-extra
git fetch
git checkout main
./portable/release.sh <version>-test

where <version> is the Git version.