mkdir <workspace dir>
cd <workspace dir>
repo init -u https://code.rdkcentral.com/r/manifests -b dunfell -m rdkb-extsrc.xml
repo sync -j`nproc` --no-clone-bundle
cd rdkb/components/generic/mtu_modifier 
git fetch https://code.rdkcentral.com/r/rdkb/components/generic/mtu_modifier refs/changes/99/97299/2 && git cherry-pick FETCH_HEAD && cd -
MACHINE=raspberrypi4-rdk-broadband source meta-cmf-raspberrypi/setup-environment
bitbake rdk-generic-broadband-image    

mkdir <workspace dir>
cd <workspace dir>
repo init -u https://code.rdkcentral.com/r/manifests -b dunfell -m rdkb-extsrc.xml
repo sync -j`nproc` --no-clone-bundle

<Cherrypick the below topic changes manually that are still pending for merging>
cd rdkb/components/generic/mtu_modifier 
git fetch https://code.rdkcentral.com/r/q/topic:rdkb-64bit-build-errors
/rdkb/components/generic/mtu_modifier refs/changes/99/97299/2 && git cherry-pick FETCH_HEAD && cd -
cd rdkb/components/opensource/ccsp/OneWifi 
git fetch https://code.rdkcentral.com/r/q/topic:rdkb-64bit-runtime-errors

/rdkb/components/opensource/ccsp/OneWifi refs/changes/36/96136/4 && git cherry-pick FETCH_HEAD && cd -
MACHINE=raspberrypi4-64-rdk-broadband source meta-cmf-raspberrypi/setup-environment
bitbake rdk-generic-broadband-image