config: expose used Git version and path
config: expose used Git version and path

Due to our SCM wrapper in `Library/ENV/scm/git`, lookup is a bit more
complicated than just picking the first match in `PATH`. Make debugging
easier by printing the version and path of the Git actually used by us.

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