Comment by ynezz

It's almost there </sarcasm>:

  origin git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
  rpi https://github.com/raspberrypi/linux.git

  $ git diff --shortstat origin/linux-4.19.y..rpi/rpi-4.19.y
  911 files changed, 321070 insertions(+), 5576 deletions(-)

  $ git diff --shortstat origin/linux-5.4.y..rpi/rpi-5.4.y
  810 files changed, 309964 insertions(+), 2518 deletions(-)

  $ git diff --shortstat origin/linux-5.5.y..rpi/rpi-5.5.y
  820 files changed, 308669 insertions(+), 2420 deletions(-)