$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-polymaking.git /var/lib/mock/f39-build-1972735-43327/root/chroot_tmpdir/scmroot/gap-pkg-polymaking
Cloning into '/var/lib/mock/f39-build-1972735-43327/root/chroot_tmpdir/scmroot/gap-pkg-polymaking'...
$ git fetch origin a053ca10f45892dcdcdfcebc1beafe0e1165227c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-polymaking
 * [new ref]         a053ca10f45892dcdcdfcebc1beafe0e1165227c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a053ca1 Version 0.8.7.  Drop upstreamed doc patch.