$ git clone -n https://src.fedoraproject.org/rpms/cbmc.git /var/lib/mock/f40-build-1992350-43589/root/chroot_tmpdir/scmroot/cbmc
Cloning into '/var/lib/mock/f40-build-1992350-43589/root/chroot_tmpdir/scmroot/cbmc'...
$ git fetch origin e8d2d4b7cf2d5980fb82385e2311185f20de1d3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cbmc
 * [new ref]         e8d2d4b7cf2d5980fb82385e2311185f20de1d3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8d2d4b fix ix86 Rawhide FTBFS