$ echo $0
bash
$ sleep 600 &
[1] 5764
$ disown -h %1

       disown [-ar] [-h] [jobspec ...]
              Without options, each jobspec  is  removed  from  the  table  of
              active  jobs.   If  the  -h option is given, each jobspec is not
              removed from the table, but is marked so that SIGHUP is not sent
              to  the  job  if  the shell receives a SIGHUP.  If no jobspec is
              present, and neither the -a nor the -r option is  supplied,  the
              current  job  is used.  If no jobspec is supplied, the -a option
              means to remove or mark all jobs; the -r option without  a  job‐
              spec  argument  restricts operation to running jobs.  The return
              value is 0 unless a jobspec does not specify a valid job.