$ git clone -n https://src.fedoraproject.org/rpms/czmq.git /var/lib/mock/f40-build-2209097-52150/root/chroot_tmpdir/scmroot/czmq
Cloning into '/var/lib/mock/f40-build-2209097-52150/root/chroot_tmpdir/scmroot/czmq'...
$ git fetch origin 29c4bcba2ed3bb560a6d1dfd837168f6702e2ff7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/czmq
 * [new ref]         29c4bcba2ed3bb560a6d1dfd837168f6702e2ff7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29c4bcb Rebuild for ZeroMQ 4.3.5