How to delete .orig files after merge from git repository?

you can do:

git config --global mergetool.keepBackup false

For more info, refer to to Git mergetool generates unwanted .orig files

Try git clean more info you can find here or here

Best solution in this case is to keep it simple and get rid of those files independently of git:

cd /your/repo/directory
find . -name '*.orig' -delete

Alternatively, in Windows/PowerShell, you can run the following command

cd \your\repo\directory
Get-ChildItem -Recurse -Filter '*.orig' | Remove-Item

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