$ git clone -n https://src.fedoraproject.org/rpms/rust-cbor-codec.git /var/lib/mock/f45-build-40719-775/root/chroot_tmpdir/scmroot/rust-cbor-codec
Cloning into '/var/lib/mock/f45-build-40719-775/root/chroot_tmpdir/scmroot/rust-cbor-codec'...
$ git fetch origin 5318a2a376b800c4fba2b51bc625344f7e70a57f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cbor-codec
 * [new ref]         5318a2a376b800c4fba2b51bc625344f7e70a57f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5318a2a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild