read the git-for-windows url from get.x-cmd.com #7

for /f "delims=" %%a in ('curl -s "https://get.x-cmd.com/git-for-windows.latest.url.txt"') do set "url=%%a" 
     
    :: Check if a URL was read. 
    if not defined url ( 
      echo Error reading URL. Exiting. 
      goto :eof 
    )