$ git clone -n https://src.fedoraproject.org/rpms/rust-bytelines.git /var/lib/mock/f40-build-2091717-50239/root/chroot_tmpdir/scmroot/rust-bytelines
Cloning into '/var/lib/mock/f40-build-2091717-50239/root/chroot_tmpdir/scmroot/rust-bytelines'...
$ git fetch origin c42b70cb06fe303a55d6a4c17815a10e6dddd71e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bytelines
 * [new ref]         c42b70cb06fe303a55d6a4c17815a10e6dddd71e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c42b70c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild