CiBoT commit limit should be raised to 100 for in-progress branches

If my understanding is correct, the purpose of the 'no more than 15 commits' heuristic is to try to ensure the branch has been rebased properly.

However, there is a better way to do that:

git merge-base master branch_name

will tell you which commit was the point where branch_name separated from master, and

git show -s --format=%ci `git merge-base master origin/MDL-43089`

will get you the date of that commit.

Verifying that

git log --oneline ^master origin/MDL-43089 | wc

gives the same output as

git log --oneline --no-merges ^master origin/MDL-43089 | wc

Will confirm that the branch is a simple branch.

Really, I just wanted CiBoT output for MDL-43089, to see where we were at.