What is the rule for pkgver for package from git?

[ghost]

For example, I want to make mingw-w64-supertux-git. But I don't know what pkgver will be.

This is the PKGBUILD for SuperTux stable with pkgver=0.6.3:

https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-supertux/PKGBUILD

Can I use the pkgver() function in this PKGBUILD?

https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=genie-git

Update:

Should I use this pkgver() function in this PKGBUILD?

https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=supertux-git

@Biswa96