$ git clone -n https://src.fedoraproject.org/rpms/rust-mdbook-renderer.git /var/lib/mock/f45-build-43231-801/root/chroot_tmpdir/scmroot/rust-mdbook-renderer
Cloning into '/var/lib/mock/f45-build-43231-801/root/chroot_tmpdir/scmroot/rust-mdbook-renderer'...
$ git fetch origin 1ac227a5ea34343f8775098fea6534716b8a2609:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mdbook-renderer
 * [new ref]         1ac227a5ea34343f8775098fea6534716b8a2609 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ac227a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild