$ git clone -n http://fedora.riscv.rocks:3000/rpms/kernel.git /var/lib/mock/f40-build-809916-145576/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f40-build-809916-145576/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin 781c7c720e12d1159a4aac5de8b91964fb421c3d:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/kernel
 * [new ref]             781c7c720e12d1159a4aac5de8b91964fb421c3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 781c7c720 riscv64