extract: add progress message when searching Git history
extract: add progress message when searching Git history

For the impatient ones out there.

MikeMcQuaid/brew,EricFromCanada/brew,DomT4/brew,reitermarkus/brew,nandub/brew,EricFromCanada/brew,konqui/brew,DomT4/brew,vitorgalvao/brew,Linuxbrew/brew,nandub/brew,reitermarkus/brew,reitermarkus/brew,Linuxbrew/brew,maxim-belkin/brew,claui/brew,MikeMcQuaid/brew,maxim-belkin/brew,mahori/brew,reitermarkus/brew,konqui/brew,DomT4/brew,nandub/brew,vitorgalvao/brew,vitorgalvao/brew,Homebrew/brew,maxim-belkin/brew,Linuxbrew/brew,konqui/brew,claui/brew,Homebrew/brew,claui/brew,EricFromCanada/brew,vitorgalvao/brew,konqui/brew,JCount/brew,DomT4/brew,nandub/brew,EricFromCanada/brew,Linuxbrew/brew,JCount/brew,MikeMcQuaid/brew,sjackman/homebrew,sjackman/homebrew,sjackman/homebrew,sjackman/homebrew,Homebrew/brew,mahori/brew,mahori/brew,JCount/brew,Homebrew/brew,JCount/brew,MikeMcQuaid/brew,claui/brew,mahori/brew