$ git clone -n https://src.fedoraproject.org/rpms/librdkafka.git /var/lib/mock/f40-build-786175-134202/root/chroot_tmpdir/scmroot/librdkafka
Cloning into '/var/lib/mock/f40-build-786175-134202/root/chroot_tmpdir/scmroot/librdkafka'...
$ git fetch origin 23897131ac1c3109fd6908c6cae649a520233c87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librdkafka
 * [new ref]         23897131ac1c3109fd6908c6cae649a520233c87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2389713 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild