$ git clone -n https://src.fedoraproject.org/rpms/R-discretization.git /var/lib/mock/f38-build-side-42-init-devel-776058-27809/root/chroot_tmpdir/scmroot/R-discretization
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-776058-27809/root/chroot_tmpdir/scmroot/R-discretization'...
$ git fetch origin 13957b6a2d79ea4da61d3d6959be2ac7f86f837d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-discretization
 * [new ref]         13957b6a2d79ea4da61d3d6959be2ac7f86f837d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13957b6 Initial import (fedora#2184737).