$ git clone -n https://src.fedoraproject.org/rpms/cddlib.git /var/lib/mock/f40-build-801189-143733/root/chroot_tmpdir/scmroot/cddlib
Cloning into '/var/lib/mock/f40-build-801189-143733/root/chroot_tmpdir/scmroot/cddlib'...
$ git fetch origin fa33a7ebc8b9acc718c979a3cdedab97f3f7d307:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cddlib
 * [new ref]         fa33a7ebc8b9acc718c979a3cdedab97f3f7d307 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa33a7e Add upstream thread safety patch