$ git clone -n https://src.fedoraproject.org/rpms/rust-zbus_names /var/lib/mock/f42-build-3436081-45431/root/chroot_tmpdir/scmroot/rust-zbus_names
Cloning into '/var/lib/mock/f42-build-3436081-45431/root/chroot_tmpdir/scmroot/rust-zbus_names'...
$ git fetch origin 46e54e963bb902db112f1c648cf82b945cfe09ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zbus_names
 * [new ref]         46e54e963bb902db112f1c648cf82b945cfe09ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46e54e9 Update to version 4.2.0; Fixes RHBZ#2337364