You can install gnu-compative shell commands when installing git for Windows. It even includes useful unix utilites like bash, so check it out if you're interested.
More project information: https://gitforwindows.org/
Official download: https://git-scm.com/install/windows
Always wondered if git bash was cygwin, I don't think it is, but it seems very similar.
Or MSYS2, to go even further. https://www.msys2.org/