WebRTC building on configurable commit

[GensaGames]

Hi,
I think a lot of people still getting different error, while building WebRTC on special commit. So previous time is was pretty simple, by adding just commit:

get_webrtc <commit sha>

Now, maybe with Google branches management, we getting several issue. So maybe there some advice, how you still building version on special SHA. If someone have their solution, please share it with us!

Thanks!

 src (ERROR)
----------------------------------------
[0:00:00] Started.
[0:00:04] _____ src : Attempting rebase onto 49f7bd357dafab4f7e3e1cd5fbe8d9cbf5730057...
[0:00:04] 
[0:00:04] Rebase produced error output:
fatal: Needed a single revision
Does not point to a valid commit: 49f7bd357dafab4f7e3e1cd5fbe8d9cbf5730057
----------------------------------------

Error: Command 'git checkout --quiet 7c40e9acdb30731823b760e253ee454795f88764' returned non-zero exit status 128 in /home//WebRTCRepository/webrtc-build-scripts/android/webrtc/src
fatal: reference is not a tree: 7c40e9acdb30731823b760e253ee454795f88764