We are also getting error during XCode13 bot checkout operation , observed below mentioned error :
: Error occurred loading revisioned blueprint from workspace: Error Domain=com.apple.dt.SourceControlErrorDomain Code=-300 "The remote repository could not be accessed." UserInfo={com.apple.dt.sourcecontrol.UnderlyingErrorString=, NSLocalizedDescription=The remote repository could not be accessed., NSLocalizedRecoverySuggestion=Make sure a valid repository exists at the specified location and that the correct credentials have been supplied.}
This error does not happen in XCode 12.5.1