$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-utf8.git /var/lib/mock/f41-build-840089-160507/root/chroot_tmpdir/scmroot/R-utf8
Cloning into '/var/lib/mock/f41-build-840089-160507/root/chroot_tmpdir/scmroot/R-utf8'...
$ git fetch origin c44a5d8de96222fdd34e45e4baabaeb592f69bcf:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-utf8
 * [new ref]         c44a5d8de96222fdd34e45e4baabaeb592f69bcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c44a5d8 Turn off bootstrap (riscv64)