on IRC a couple of days ago someone ended up with
gbp:info: Upstream version is 2024.10+ds2+~3.22.1+ds1+~0.0~git20201031000720.fb1097b+~0.0~git20230406145805.3d9dc50+~0.0~git20230424222543.48f8cf8
(they wanted to bundle three git snapshots of related components in the same source package, and the default version number scheme for git-derived packages is... slightly suboptimal)