Fix tag checkout on CIs

[aesteve-rh]

build-aux/release complain when executed in the pipelines:

'subprocess.CalledProcessError: Command '('git', 'describe', '--tags', '--match', 'v[0-9]*')' returned non-zero exit status 128.'

In order to avoid this fail we need to create tag like vx.y.z in the CIs. It could either be manually assigned, as v.0.0.0 or v1.2.3, or taken from the repository tags with a limited depth, so that we print the real tag in the CI job.