$ git clone -n https://github.com/xcp-ng-rpms/linux-firmware.git /var/lib/mock/v8.1-base-1773-1227/root/chroot_tmpdir/scmroot/linux-firmware
Cloning into '/var/lib/mock/v8.1-base-1773-1227/root/chroot_tmpdir/scmroot/linux-firmware'...
$ git reset --hard b70638c4f5e798f7056c683f538236d72fe7d66b
Downloading SOURCES/linux-firmware.tar.gz (178 MB)
HEAD is now at b70638c Merge branch 'XS-8.1'