$ git clone -n https://src.fedoraproject.org/rpms/rust-rustbus.git /var/lib/mock/f45-build-44571-815/root/chroot_tmpdir/scmroot/rust-rustbus
Cloning into '/var/lib/mock/f45-build-44571-815/root/chroot_tmpdir/scmroot/rust-rustbus'...
$ git fetch origin 4d89a99b432ec5cab364754da45248267f63d807:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustbus
 * [new ref]         4d89a99b432ec5cab364754da45248267f63d807 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d89a99 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild