feature: tag from ci fetches commits from remote api

src/git_flow/git.py

@@ -1,9 +1,20 @@
 import subprocess
+from dataclasses import dataclass
 
 from git_flow import FLOWCONFIG_FILENAME
 from git_flow.io import *
 
 
+@dataclass
+class Commit:
+    """Datos de un commit necesarios para versionar y generar el changelog."""
+
+    sha: str
+    subject: str
+    email: str
+    is_merge: bool = False
+
+
 class Git:
     class Status:
         worktree: str
@@ -65,6 +76,20 @@ class Git:
 
         return Git("show", env_commits[-1] + "^", patch=False, format="%h").firstline()
 
+    @staticmethod
+    def get_commits(base: str, branch: str) -> list[Commit]:
+        """Commits propios de la rama (sin merges), del más nuevo al más viejo."""
+        lines = Git(
+            "log", base + ".." + branch, first_parent=True, merges=False, format="%h%x09%ae%x09%s"
+        ).lines()
+        commits = []
+
+        for line in lines:
+            [sha, email, subject] = line.split("\t", 2)
+            commits.append(Commit(sha, subject, email))
+
+        return commits
+
     @staticmethod
     def _get_references(kind: str):
         prefix = "refs/" + kind