$ git clone -n https://src.fedoraproject.org/rpms/rust-rocket_cors.git /var/lib/mock/f45-build-44471-814/root/chroot_tmpdir/scmroot/rust-rocket_cors
Cloning into '/var/lib/mock/f45-build-44471-814/root/chroot_tmpdir/scmroot/rust-rocket_cors'...
$ git fetch origin dba81c0aa22c6dd6f1fae538779dabdc40e77fb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rocket_cors
 * [new ref]         dba81c0aa22c6dd6f1fae538779dabdc40e77fb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dba81c0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild