$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-cachem.git /var/lib/mock/f41-build-838718-159809/root/chroot_tmpdir/scmroot/R-cachem
Cloning into '/var/lib/mock/f41-build-838718-159809/root/chroot_tmpdir/scmroot/R-cachem'...
$ git fetch origin cce251c8b48fa4a51bb4e478859475de1a4f0046:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-cachem
 * [new ref]         cce251c8b48fa4a51bb4e478859475de1a4f0046 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cce251c disables checks to bootstrap testthat