Unable to update on Windows

I'm unable to update git-extras using the command "git extras update" on Windows 10:

>>> sudo git extras update
Setting up 'git-extras'....
'C:\Users\Rafael' is not recognized as an internal or external command,
operable program or batch file.

My home folder is: "C:\Users\Rafael Dominiquini"
My git is installed on: "C:\Program Files\Git"

• In the git-extras file, I debug this variables:

  local bin="$(command -v git-extras)"
  local prefix=${bin%/*/*}

• Value:

BIN: /mingw64/bin/git-extras 
PREFIX: /mingw64

I was able to update the program using the installation method:

• Cloning the repository
• Running "sudo install.cmd"

Thanks

Start with the git-extras file and the git extras update path, using the reported Windows 10 command and the paths containing spaces as the reproduction. Compare that behavior with the working install.cmd method. Done means the update command runs successfully from the reported Windows setup; no test file is mentioned.