Function resolveRef

src/utils/git/gitFilesystem.ts:203–219

(
  gitDir: string,
  ref: string,
)

 *   - Peeled:  `^<40-hex-sha>\n` (after annotated tag entries)
 */
export async function resolveRef(
  gitDir: string,
  ref: string,
): Promise<string | null> {
  const result = await resolveRefInDir(gitDir, ref)
  if (result) {
    return result
  }

  // For worktrees: try the common gitdir where shared refs live
  const commonDir = await getCommonDir(gitDir)
  if (commonDir && commonDir !== gitDir) {
    return resolveRefInDir(commonDir, ref)
  }

  return null
}

async function resolveRefInDir(
  dir: string,