If the number commits in the specified range is less than the page size, the commit list is correctly truncated, for example:

https://stash.dev.internal.atlassian.com/projects/STASH/repos/stash/commits?until=f7fb48f&since=f7fb48f~2

However if there is more than a page of results, the 'since' parameter is ignored and the commit list will scroll all the way back to the root commit, for example:

https://stash.dev.internal.atlassian.com/projects/STASH/repos/stash/commits?until=f7fb48f&since=f7fb48f~20

It'd be nice if the commit list was correctly truncated. Customers have reported that they use these links to specify commit ranges in emails, etc.