Exporter does not show its version

[Dmitry-Eremeev]

1. download exporter from
   https://github.com/inovex/prometheus-libvirt-exporter/releases/download/v1.6.0/prometheus-libvirt-exporter-1.6.0.linux-amd64.tar.gz

2. extract from archive

3. check its version

$ ./prometheus-libvirt-exporter --version
libvirt_exporter, version (branch: , revision: unknown)
build user:
build date:
go version: go1.22.1
platform: linux/amd64
tags: netgo

4. check log messages about its version

$ ./prometheus-libvirt-exporter
ts=2025-01-28T16:27:58.402Z caller=main.go:44 level=info msg="Starting libvirt_exporter" version="(version=, branch=, revision=unknown)"
ts=2025-01-28T16:27:58.402Z caller=main.go:45 level=info msg="Build context" build_context="(go=go1.22.1, platform=linux/amd64, user=, date=, tags=netgo)"
ts=2025-01-28T16:27:58.402Z caller=tls_config.go:313 level=info msg="Listening on" address=[::]:9177
ts=2025-01-28T16:27:58.402Z caller=tls_config.go:316 level=info msg="TLS is disabled." http2=false address=[::]:9177

Expected:
to see exporter version

Actual:
No exporter version