$ git clone -n https://src.fedoraproject.org/rpms/polymake.git /var/lib/mock/f42-build-865083-172791/root/chroot_tmpdir/scmroot/polymake
Cloning into '/var/lib/mock/f42-build-865083-172791/root/chroot_tmpdir/scmroot/polymake'...
$ git fetch origin e1432d2aabaef118a04cc7980d05f9ba4339e407:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polymake
 * [new ref]         e1432d2aabaef118a04cc7980d05f9ba4339e407 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1432d2 Rebuild for scip 9.2.0