Ignore non-semver tags

.editorconfig

@@ -4,6 +4,7 @@ root = true
 [*]
 indent_style = space
 indent_size = 4
+ij_continuation_indent_size = 4
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true

src/main/java/pl/allegro/tech/build/axion/release/infrastructure/git/GitRepository.java

@@ -1,5 +1,7 @@
 package pl.allegro.tech.build.axion.release.infrastructure.git;
 
+import com.github.zafarkhaja.semver.ParseException;
+import com.github.zafarkhaja.semver.Version;
 import org.eclipse.jgit.api.*;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.api.errors.NoHeadException;
@@ -491,13 +493,24 @@ private Map<String, List<String>> tagsMatching(List<Pattern> patterns, RevWalk w
                 parseCommitSafe(walk, tag.getObjectId())
             ))
             .filter(t -> patterns.stream().anyMatch(pattern -> pattern.matcher(t.name).matches()))
+            .filter(t -> isSemver(t.name))
             .collect(
                 HashMap::new,
                 (m, t) -> m.computeIfAbsent(t.id, (s) -> new ArrayList<>()).add(t.name),
                 HashMap::putAll
             );
     }
 
+    private boolean isSemver(String tagName) {
+        try {
+            Version.valueOf(tagName);
+            return true;
+        } catch (ParseException e) {
+            logger.info("Found non-semver tag '{}' matching one of the configured prefixes, ignoring it.", tagName);
+            return false;
+        }
+    }
+
     private String parseCommitSafe(RevWalk walk, AnyObjectId commitId) {
         try {
             return walk.parseCommit(commitId).getName();