[Rivet] Download Rivet unreleased version

[Lizardo Valencia Palomo]

Dear experts


I want to use the analysis ATLAS_2017_I1509919, unfortunately it is not 
present in the Rivet realease 2.5.3 because the analysis has just been 
included in the RIvet framework a couple of days ago 
(https://rivet.hepforge.org/trac/browser/src/Analyses). So, I would like 
to know if it is possible to download this unrealeased version. If so, 
how can I do it?


Thanks for your help,

Lizardo