Init git user name and email as GHA virtual machines do no do it.

[asmorkalov]

Windows ARM virtual machine:

  POST git-upload-pack (491 bytes)
  POST git-upload-pack (976 bytes)
  From https://github.com/asmorkalov/opencv
   * branch                  as/alernative_win_arm_neon_check -> FETCH_HEAD
  Committer identity unknown
  
  *** Please tell me who you are.
  
  Run
  
    git config --global user.email "[email protected]"
    git config --global user.name "Your Name"
  
  to set your account's default identity.
  Omit --global to set the identity only in this repository.
  
  fatal: unable to auto-detect email address (got 'runneradmin@runnervm1u799.(none)')

[opencv-alalek]

BTW, not a valid email