* git-debrebase: convert-from-gbp: Use same algorithm for finding
upstream commitish as new-upstream. Closes:#905062.
* git-debrebase: Improve error messages for bad options.
* git-debrebase: convert-from-gbp: Use same algorithm for finding
upstream commitish as new-upstream. Closes:#905062.
* git-debrebase: Improve error messages for bad options.