$ git clone -n https://src.fedoraproject.org/rpms/xeus-zmq.git /var/lib/mock/f38-build-side-43-rust-devel-1424930-31548/root/chroot_tmpdir/scmroot/xeus-zmq
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1424930-31548/root/chroot_tmpdir/scmroot/xeus-zmq'...
$ git fetch origin f2c6f16b61beb7a372d73f61ac8cb02c739c37b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xeus-zmq
 * [new ref]         f2c6f16b61beb7a372d73f61ac8cb02c739c37b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2c6f16 Relax version requirement on xeus