TortoiseGit:
Select TortoiseGit from the Windows Explorer right-click drop-down menu for the Boost tree directory, select "Show log" from the TortoiseGit drop-down, and copy the SHA-1 (or part of the SHA-a) into the Filter box (with the little magnifying glass icon). If you get only a single "Working dir changes" entry with a SHA of all zeros, it means the SHA you entered wasn't found.
That doesn't really help: all it shows you is the automated commit in the super project that that hash refers to, it tells you nothing about which version the particular sub-libraries are on. Ah wait... right click and "Browse repository" gives you a view of the repro * at that commit*, you can then drill down to the library(s) of interest and right click and select "Show log" to get the information you need. OK, that's almost useable. Now we just need to sort out why Marshall's results run on the master branch are showing up for develop? Thanks, John.