Add fetch.parallel option

src/git-source-provider.ts

@@ -153,6 +153,7 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
 
     // Fetch
     core.startGroup('Fetching the repository')
+    await git.config('fetch.parallel', settings.fetchParallel.toString())
     const fetchOptions: {
       filter?: string
       fetchDepth?: number

src/git-source-settings.ts

@@ -54,6 +54,11 @@ export interface IGitSourceSettings {
    */
   fetchTags: boolean
 
+  /**
+   * Indicates the maximal number of fetch operations to be run in parallel at a time
+   */
+  fetchParallel: number
+
   /**
    * Indicates whether to use the --progress option when fetching
    */

src/input-helper.ts

@@ -113,6 +113,15 @@ export async function getInputs(): Promise<IGitSourceSettings> {
     (core.getInput('fetch-tags') || 'false').toUpperCase() === 'TRUE'
   core.debug(`fetch tags = ${result.fetchTags}`)
 
+  // Fetch tags
+  result.fetchParallel = Math.floor(
+    Number(core.getInput('fetch-parallel') || '1')
+  )
+  if (isNaN(result.fetchParallel) || result.fetchParallel < 0) {
+    result.fetchParallel = 0
+  }
+  core.debug(`fetch parallel = ${result.fetchTags}`)
+
   // Show fetch progress
   result.showProgress =
     (core.getInput('show-progress') || 'true').toUpperCase() === 'TRUE'