$ git clone -n https://src.fedoraproject.org/rpms/rust-count-zeroes.git /var/lib/mock/f40-build-780192-130709/root/chroot_tmpdir/scmroot/rust-count-zeroes
Cloning into '/var/lib/mock/f40-build-780192-130709/root/chroot_tmpdir/scmroot/rust-count-zeroes'...
$ git fetch origin e0c71b79f1abccd2473b76a0886dc0a347911be1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-count-zeroes
 * [new ref]         e0c71b79f1abccd2473b76a0886dc0a347911be1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0c71b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild