```bitbake
require swupdate.inc
require swupdate_tools.inc

DEFAULT_PREFERENCE = "-1"

SRCREV = '8a2ff356c3d93bb4f681a511e6b42ed64dcf6409'
```

Allow .bbappend files to overwrite SRCREV
user
```bitbake
require swupdate.inc
require swupdate_tools.inc

DEFAULT_PREFERENCE = "-1"

SRCREV ?= '8a2ff356c3d93bb4f681a511e6b42ed64dcf6409'
```
assistant