$ git clone -n https://src.fedoraproject.org/rpms/rust-rustdoc-types0.57.git /var/lib/mock/f45-build-44572-815/root/chroot_tmpdir/scmroot/rust-rustdoc-types0.57
Cloning into '/var/lib/mock/f45-build-44572-815/root/chroot_tmpdir/scmroot/rust-rustdoc-types0.57'...
$ git fetch origin 12cbe38ba3b88ed80066b7a71f1b034ea1bebe0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustdoc-types0.57
 * [new ref]         12cbe38ba3b88ed80066b7a71f1b034ea1bebe0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12cbe38 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild