$ git clone -n http://fedora.riscv.rocks:3000/rpms/grub2.git /var/lib/mock/f40-build-794738-139784/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/f40-build-794738-139784/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 59850834d821cb2b80bdb8508ecb2bdeae5a1889:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/grub2
 * [new ref]         59850834d821cb2b80bdb8508ecb2bdeae5a1889 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5985083 Backport R_RISCV_CALL_PLT reloc patch for riscv64