[falcolas]

Windows offers shell scripts as well. Powershell, instead of Bash/Zsh/..., but they still offer many of the same opportunities.

Considering that teams frequently homogenize on one type of machine - bet it windows or Mac or Linux, shell scripts are typically portable enough for these use cases.

[onion2k]

Msysgit on Windows comes with a bash emulator (for running hooks) that could be used in a cross-platform build process.