$ git clone -n https://src.fedoraproject.org/rpms/python-productmd.git /var/lib/mock/f39-build-1430820-31747/root/chroot_tmpdir/scmroot/python-productmd
Cloning into '/var/lib/mock/f39-build-1430820-31747/root/chroot_tmpdir/scmroot/python-productmd'...
$ git fetch origin d1a01d057f0cb1a322c9f9d3121fd36b8e0dccf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-productmd
 * [new ref]         d1a01d057f0cb1a322c9f9d3121fd36b8e0dccf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1a01d0 - New upstream release 1.37