$ git clone -n https://src.fedoraproject.org/rpms/rust-str_indices.git /var/lib/mock/f45-build-45186-821/root/chroot_tmpdir/scmroot/rust-str_indices
Cloning into '/var/lib/mock/f45-build-45186-821/root/chroot_tmpdir/scmroot/rust-str_indices'...
$ git fetch origin 808583220cea025deff17465bac9a84e47f08030:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-str_indices
 * [new ref]         808583220cea025deff17465bac9a84e47f08030 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8085832 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild