[yocto] kernel source code

[jags gediya]

I have run below command

bitbake -c fetchall core-image-minimal

It has created downloads directory and packages source codes are
there inside, but i am not able to find the kernel and u-boot source code.

I have build core-image-minimal without internet connectivity, and kernel and
u-boot have also built properly. I am not getting from where it is taking
the source code for kernel and u-boot.

I am building yocto sdk for imx6l evolution kit and i have checked out
daisy branch.

Please suggest where can be the source code for kernel and u-boot
before build but after running fetchall command.