$ git clone -n https://src.fedoraproject.org/rpms/rust-zbus_names.git /var/lib/mock/f45-build-46341-833/root/chroot_tmpdir/scmroot/rust-zbus_names
Cloning into '/var/lib/mock/f45-build-46341-833/root/chroot_tmpdir/scmroot/rust-zbus_names'...
$ git fetch origin 12a5fc4b26213275ad81c318aee04d21733d8ac0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zbus_names
 * [new ref]         12a5fc4b26213275ad81c318aee04d21733d8ac0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12a5fc4 Update to version 4.3.4; Fixes RHBZ#2497894