$ git clone -n http://fedora.riscv.rocks:3000/rpms/kernel.git /var/lib/mock/f39-build-730067-102298/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f39-build-730067-102298/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin 77f2261d810df7210daf3a5ec2b8d1f72c0ee63c:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/kernel
 * [new ref]             77f2261d810df7210daf3a5ec2b8d1f72c0ee63c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77f2261d8 Rebase patch for RC4