$ git clone -n https://src.fedoraproject.org/rpms/rust-prost-reflect.git /var/lib/mock/f45-build-44073-810/root/chroot_tmpdir/scmroot/rust-prost-reflect
Cloning into '/var/lib/mock/f45-build-44073-810/root/chroot_tmpdir/scmroot/rust-prost-reflect'...
$ git fetch origin a6834bc9f888c59fcd7d9e6150d7ce5a7be37ba1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-prost-reflect
 * [new ref]         a6834bc9f888c59fcd7d9e6150d7ce5a7be37ba1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6834bc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild