On Tue, Jul 07, 2020 at 03:16:06PM +0100, Richard Purdie wrote:

The fetcher is strict about which branch the SHA1 is on. There were
good reasons we started enforcing that, I have to admit I don't
remember the reasons offhand. Its that which is tripping things up
though.

One of the reasons which I still find useful is that switching from
SRCREV in the recipe to AUTOREV does give you latest commit from the
same branch where locked SRCREV was. I don't know how important this is
for other people work flows.