failed to determine version of main module: git: unsupported object type

https://github.com/prometheus/node_exporter cannot be analysed because of tag https://github.com/prometheus/node_exporter/releases/tag/v0.15.0

Deleting this tag works around the issue

Reproduce analysis of prometheus/node_exporter at tag v0.15.0 and inspect the code path that determines the main module version from Git metadata. The fix is complete when that tag is analyzed successfully without deleting it, with a regression test covering the unsupported object type.

Written by the indexing model from the issue text.