$ git clone -n http://fedora.riscv.rocks:3000/rpms/grubby.git /var/lib/mock/f39-build-730311-102665/root/chroot_tmpdir/scmroot/grubby
Cloning into '/var/lib/mock/f39-build-730311-102665/root/chroot_tmpdir/scmroot/grubby'...
$ git fetch origin aa9b1b454fd0c792226cefb65d744fadfaa8acda:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/grubby
 * [new ref]         aa9b1b454fd0c792226cefb65d744fadfaa8acda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa9b1b4 Drop installkernel so that it can by provided by systemd