Git Alias - Multiple Commands and Parameters

This will work (tested with zsh and bash):

[alias] chs = !git checkout $1 && git status

This targets Windows batch / msysgit bash; might not work on other environments.

As Olivier Verdier and Lily Ballard have said

[alias] chs = !git checkout $1 && git status

almost works, but gives a spurious extra insertion of the argument ...

git chs demo -> git checkout demo && git status demo

But if you add && : to the end of your alias, then the spurious argument is consumed into a location tag.

So

[alias] chs = !git checkout $1 && git status && :

gives the correct output ... git chs demo -> git checkout demo && git status