$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-htmlwidgets.git /var/lib/mock/f41-build-839981-160432/root/chroot_tmpdir/scmroot/R-htmlwidgets
Cloning into '/var/lib/mock/f41-build-839981-160432/root/chroot_tmpdir/scmroot/R-htmlwidgets'...
$ git fetch origin 122087d93581604405059a015a8517d2f55caeca:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-htmlwidgets
 * [new ref]         122087d93581604405059a015a8517d2f55caeca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 122087d Enable bootstrap