$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-diffobj.git /var/lib/mock/f41-build-840053-160507/root/chroot_tmpdir/scmroot/R-diffobj
Cloning into '/var/lib/mock/f41-build-840053-160507/root/chroot_tmpdir/scmroot/R-diffobj'...
$ git fetch origin a143beb529a58a0f30495fc77edaf211e5c11a67:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-diffobj
 * [new ref]         a143beb529a58a0f30495fc77edaf211e5c11a67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a143beb Turn off bootstrap (riscv64)