$ git clone -n https://src.fedoraproject.org/rpms/papi.git /var/lib/mock/f42-build-3460583-45515/root/chroot_tmpdir/scmroot/papi
Cloning into '/var/lib/mock/f42-build-3460583-45515/root/chroot_tmpdir/scmroot/papi'...
$ git fetch origin 23f4b0440d05765734e20d397d9d256f939e0ca4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/papi
 * [new ref]         23f4b0440d05765734e20d397d9d256f939e0ca4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23f4b04 Fix rawhide FTBFS. (rhbz#2340999)