$ git clone -n https://src.fedoraproject.org/rpms/rust-hashbrown0.14.git /var/lib/mock/f45-build-42296-792/root/chroot_tmpdir/scmroot/rust-hashbrown0.14
Cloning into '/var/lib/mock/f45-build-42296-792/root/chroot_tmpdir/scmroot/rust-hashbrown0.14'...
$ git fetch origin bdba28e263095ffa9c544cb8a1a9901960836cea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hashbrown0.14
 * [new ref]         bdba28e263095ffa9c544cb8a1a9901960836cea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bdba28e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild