$ git clone -n https://src.fedoraproject.org/rpms/julia.git /var/lib/mock/f38-build-side-42-init-devel-1118151-30193/root/chroot_tmpdir/scmroot/julia
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1118151-30193/root/chroot_tmpdir/scmroot/julia'...
$ git fetch origin cf04aaea538130276b2ac53ec1a5fecc5639b9fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/julia
 * [new ref]         cf04aaea538130276b2ac53ec1a5fecc5639b9fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf04aae Sync with rawhide