cobra command Flag value manipulation

Question

I want to validate my int64 flag to make sure that its not being recognised as a octal number (the value must not start with 0, if it does, I should be able to trim the leading 0 before assigning the value to the flag).

This is how I create the command:

var jobId int64

func newGetJobCmd() *cobra.Command {
    cmd := &cobra.Command{
        Use: "job",
        RunE: func(cmd *cobra.Command, args []string) error {
            //some processing code here that accesses `job-id` flag value
            return nil
        },
    }

    flagSet := cmd.PersistentFlags()
    flagSet.Int64Var(&jobId, "job-id", 0, "Job Id.")

    return cmd
}

This job is a sub command to get command and its used like this:
my-cli get job --job-id 065
Expectation: the code is expecting jobId to be 65, but because golang treats numbers leading with 0 to be octal, jobId when accessed in the code comes as 53 (which is the octal representation of 65).
I want to be able to somehow validate the input vale of job-id flag and trim the leading zeros before it's accessed in the RunE function.

workaround:
I have made jobId as string and bind it like this: flagSet.StringVar(&jobId, "job-id", 0, "Job Id."), then later in my code I trim the leading zeros and parse it to an int64. But this is not ideal because the command.Help() help message now documents job-id flag as a string, which is misleading because in reality it is supposed to be an int64