brew-test-bot: use git to do the diff filtering
brew-test-bot: use git to do the diff filtering

ilovezfs/brew,vitorgalvao/brew,claui/brew,jmsundar/brew,claui/brew,mistydemeo/homebrew,gordonmcshane/homebrew,AnastasiaSulyagina/brew,pseudocody/brew,mahori/brew,DomT4/brew,tonyg/homebrew,ilovezfs/brew,staticfloat/brew,vitorgalvao/brew,Homebrew/brew,sjackman/homebrew,nandub/brew,JCount/brew,staticfloat/brew,EricFromCanada/brew,JCount/brew,Homebrew/brew,AnastasiaSulyagina/brew,MikeMcQuaid/brew,sjackman/homebrew,Linuxbrew/brew,Homebrew/brew,sjackman/homebrew,claui/brew,gordonmcshane/homebrew,palxex/brew,amar-laksh/brew_sudo,staticfloat/brew,gregory-nisbet/brew,vitorgalvao/brew,reelsense/brew,amar-laksh/brew_sudo,mgrimes/brew,hanxue/linuxbrew,maxim-belkin/brew,MikeMcQuaid/brew,jmsundar/brew,reelsense/brew,hanxue/linuxbrew,JCount/brew,claui/brew,nandub/brew,aw1621107/brew,rwhogg/brew,palxex/brew,mahori/brew,alyssais/brew,reitermarkus/brew,konqui/brew,reitermarkus/brew,tonyg/homebrew,vitorgalvao/brew,AnastasiaSulyagina/brew,gordonmcshane/homebrew,reitermarkus/brew,sjackman/homebrew,aw1621107/brew,konqui/brew,maxim-belkin/brew,muellermartin/dist,maxim-belkin/brew,nandub/brew,rwhogg/brew,jmsundar/brew,alyssais/brew,palxex/brew,pseudocody/brew,EricFromCanada/brew,EricFromCanada/brew,mahori/brew,toonetown/homebrew,pseudocody/brew,alyssais/brew,Linuxbrew/brew,MikeMcQuaid/brew,tonyg/homebrew,mgrimes/brew,JCount/brew,ilovezfs/brew,zmwangx/brew,konqui/brew,MikeMcQuaid/brew,muellermartin/dist,rwhogg/brew,toonetown/homebrew,amar-laksh/brew_sudo,bfontaine/brew,EricFromCanada/brew,DomT4/brew,hanxue/linuxbrew,aw1621107/brew,nandub/brew,mistydemeo/homebrew,Homebrew/brew,muellermartin/dist,Linuxbrew/brew,bfontaine/brew,zmwangx/brew,konqui/brew,Linuxbrew/brew,gregory-nisbet/brew,gregory-nisbet/brew,zmwangx/brew,bfontaine/brew,toonetown/homebrew,mistydemeo/homebrew,mahori/brew,reelsense/brew,mgrimes/brew,DomT4/brew,reitermarkus/brew,DomT4/brew