$ git clone -n https://src.fedoraproject.org/rpms/rust-str_stack.git /var/lib/mock/f40-build-2716928-72707/root/chroot_tmpdir/scmroot/rust-str_stack
Cloning into '/var/lib/mock/f40-build-2716928-72707/root/chroot_tmpdir/scmroot/rust-str_stack'...
$ git fetch origin d4b9c1fb273113606f3ea0e99336af363afe21cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-str_stack
 * [new ref]         d4b9c1fb273113606f3ea0e99336af363afe21cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4b9c1f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild