$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode-linebreak.git /var/lib/mock/f45-build-45899-829/root/chroot_tmpdir/scmroot/rust-unicode-linebreak
Cloning into '/var/lib/mock/f45-build-45899-829/root/chroot_tmpdir/scmroot/rust-unicode-linebreak'...
$ git fetch origin 82a347d6dc53d94173c0d485a6b7a8a9c1459e0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode-linebreak
 * [new ref]         82a347d6dc53d94173c0d485a6b7a8a9c1459e0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82a347d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild