Git - only add --find-renames if the value is not the default one (microsoft#184992)

Author: lszomoru

extensions/git/src/git.ts

@@ -2021,7 +2021,7 @@ export class Repository {
 		}
 
 		// --find-renames option is only available starting with git 2.18.0
-		if (opts?.similarityThreshold && this._git.compareGitVersionTo('2.18.0') !== -1) {
+		if (opts?.similarityThreshold && opts.similarityThreshold !== 50 && this._git.compareGitVersionTo('2.18.0') !== -1) {
 			args.push(`--find-renames=${opts.similarityThreshold}%`);
 		}