$ git clone -n https://src.fedoraproject.org/rpms/rust-pori.git /var/lib/mock/f45-build-43919-809/root/chroot_tmpdir/scmroot/rust-pori
Cloning into '/var/lib/mock/f45-build-43919-809/root/chroot_tmpdir/scmroot/rust-pori'...
$ git fetch origin 533e75e48c61c4daad85ecf7628c0f5836ccaa41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pori
 * [new ref]         533e75e48c61c4daad85ecf7628c0f5836ccaa41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 533e75e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild