Add the PortableGit (supplied by GitHub for Windows) bin directory to your PATH variable and then start your console

set-gitbin-start-console.bat

@rem Usage: set-gitbin-start-console.bat "C:\path\to\my\console.exe"

@echo off

if "%1" == "" GOTO ErrorPathNotSpecified

@rem limit the scope of the changes to environment variables
setlocal

@rem todo: set GITHUB_ROOT from registry
SET GITHUB_ROOT=%USERPROFILE%\AppData\Local\GitHub\

@rem Get the most recently created version of PortableGit
FOR /f "delims=" %%F IN ('dir %GITHUB_ROOT%\PortableGit* /O:-D /T:C /B') DO (
	set filename=%%F
	goto SetPath
)

:SetPath
SET GIT_ROOT=%GITHUB_ROOT%%filename%
@echo Adding Portable Git location to path: %GIT_ROOT%

@if not exist %GIT_ROOT% GOTO ErrorNotFound

@set PATH=%GIT_ROOT%\bin;%GIT_ROOT%\cmd;%PATH%

GOTO StartShell

:ErrorNotFound
@echo Sorry can't find git path.
@rem We'll start the shell anyway so the user will see this error

:StartShell
@cmd /k %1

:ErrorPathNotSpecified
@echo Please specify the path to your shell