$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-pkgconfig.git /var/lib/mock/f41-build-838732-159760/root/chroot_tmpdir/scmroot/R-pkgconfig
Cloning into '/var/lib/mock/f41-build-838732-159760/root/chroot_tmpdir/scmroot/R-pkgconfig'...
$ git fetch origin 5cd203d3ee7d10ce722358e5b9d35592baa35671:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-pkgconfig
 * [new ref]         5cd203d3ee7d10ce722358e5b9d35592baa35671 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cd203d Enable bootstrap