Update VCS caches when installing
Update VCS caches when installing

I held off on this as I wasn't sure it made sense. Eg. if you install you'd expect it to install the same version as before? But with HEAD formula you always want the newest, that's the point. Otherwise it should be tagged/revisioned.
EricFromCanada/brew,mistydemeo/homebrew,Homebrew/brew,maxim-belkin/brew,bfontaine/brew,JCount/brew,reitermarkus/brew,pseudocody/brew,reelsense/brew,claui/brew,sjackman/homebrew,mistydemeo/homebrew,mgrimes/brew,amar-laksh/brew_sudo,reitermarkus/brew,Homebrew/brew,muellermartin/dist,gregory-nisbet/brew,AnastasiaSulyagina/brew,alyssais/brew,mgrimes/brew,muellermartin/dist,alyssais/brew,JCount/brew,claui/brew,staticfloat/brew,nandub/brew,palxex/brew,nandub/brew,amar-laksh/brew_sudo,Linuxbrew/brew,MikeMcQuaid/brew,Homebrew/brew,vitorgalvao/brew,DomT4/brew,muellermartin/dist,tonyg/homebrew,staticfloat/brew,JCount/brew,jmsundar/brew,gregory-nisbet/brew,rwhogg/brew,sjackman/homebrew,toonetown/homebrew,tonyg/homebrew,ilovezfs/brew,vitorgalvao/brew,reitermarkus/brew,palxex/brew,rwhogg/brew,bfontaine/brew,DomT4/brew,hanxue/linuxbrew,konqui/brew,claui/brew,claui/brew,maxim-belkin/brew,EricFromCanada/brew,Linuxbrew/brew,AnastasiaSulyagina/brew,palxex/brew,Homebrew/brew,konqui/brew,toonetown/homebrew,mistydemeo/homebrew,gordonmcshane/homebrew,MikeMcQuaid/brew,staticfloat/brew,jmsundar/brew,EricFromCanada/brew,reelsense/brew,mahori/brew,konqui/brew,sjackman/homebrew,hanxue/linuxbrew,MikeMcQuaid/brew,gregory-nisbet/brew,hanxue/linuxbrew,mahori/brew,pseudocody/brew,EricFromCanada/brew,mahori/brew,JCount/brew,mgrimes/brew,alyssais/brew,pseudocody/brew,nandub/brew,aw1621107/brew,Linuxbrew/brew,DomT4/brew,amar-laksh/brew_sudo,MikeMcQuaid/brew,gordonmcshane/homebrew,zmwangx/brew,maxim-belkin/brew,rwhogg/brew,Linuxbrew/brew,nandub/brew,ilovezfs/brew,zmwangx/brew,zmwangx/brew,bfontaine/brew,vitorgalvao/brew,mahori/brew,konqui/brew,aw1621107/brew,toonetown/homebrew,reitermarkus/brew,DomT4/brew,tonyg/homebrew,sjackman/homebrew,reelsense/brew,aw1621107/brew,jmsundar/brew,vitorgalvao/brew,AnastasiaSulyagina/brew,gordonmcshane/homebrew,ilovezfs/brew