$ git clone -n https://src.fedoraproject.org/rpms/rust-str_stack.git /var/lib/mock/f38-build-side-43-rust-devel-1417712-31459/root/chroot_tmpdir/scmroot/rust-str_stack
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417712-31459/root/chroot_tmpdir/scmroot/rust-str_stack'...
$ git fetch origin f8d7a46bd1f1fb0ab90091c8704c7d501cd434b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-str_stack
 * [new ref]         f8d7a46bd1f1fb0ab90091c8704c7d501cd434b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8d7a46 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild