What are those randomly generated SQL Server Agent jobs with the funny character sequence?

They some times look like 266102E5-EF3A-4D3B-B2AA-4907MM1DF28C or maybe D087318E-0C24-4895-9ECF-9530AA4D11B3 and they randomly show up in your Sql Server Agent list or do they randomly show up?Well they are your Reporting Services subscription jobs. The nice thing is that you can dissect the details in the job and then use those