Unset `HOMEBREW_TEST_GENERIC_OS` when installing Git.
Unset `HOMEBREW_TEST_GENERIC_OS` when installing Git.

EricFromCanada/brew,reitermarkus/brew,Homebrew/brew,konqui/brew,MikeMcQuaid/brew,Homebrew/brew,nandub/brew,JCount/brew,JCount/brew,mahori/brew,claui/brew,mahori/brew,JCount/brew,mahori/brew,Homebrew/brew,Homebrew/brew,nandub/brew,claui/brew,vitorgalvao/brew,konqui/brew,EricFromCanada/brew,vitorgalvao/brew,mahori/brew,MikeMcQuaid/brew,sjackman/homebrew,claui/brew,claui/brew,EricFromCanada/brew,JCount/brew,sjackman/homebrew,reitermarkus/brew,nandub/brew,EricFromCanada/brew,konqui/brew,reitermarkus/brew,MikeMcQuaid/brew,reitermarkus/brew,nandub/brew,sjackman/homebrew,vitorgalvao/brew,vitorgalvao/brew,sjackman/homebrew,konqui/brew,MikeMcQuaid/brew