adjust git call supported by older git clients (#7155)

motivation: new git call added does not work with older git clients (eg Centos7)

changes: use "git config --get remote.origin.url" instead of "git remote
get-url origin"

Author: tomerd

Sources/SourceControl/GitRepository.swift

@@ -211,7 +211,7 @@ public struct GitRepositoryProvider: RepositoryProvider, Cancellable {
     }
 
     public func isValidDirectory(_ directory: Basics.AbsolutePath, for repository: RepositorySpecifier) throws -> Bool {
-        let remoteURL = try self.git.run(["-C", directory.pathString, "remote", "get-url", "origin"])
+        let remoteURL = try self.git.run(["-C", directory.pathString, "config", "--get", "remote.origin.url"])
         return remoteURL == repository.url
     }
 

Sources/SourceControl/RepositoryManager.swift

@@ -202,7 +202,7 @@ public class RepositoryManager: Cancellable {
         // and recoverable, and as such can be ignored
         quick: if (try? self.provider.repositoryExists(at: repositoryPath)) ?? false {
             let repository = try handle.open()
-            
+
             guard ((try? self.provider.isValidDirectory(repositoryPath, for: repositorySpecifier)) ?? false) else {
                 observabilityScope.emit(warning: "\(repositoryPath) is not valid git repository for '\(repositorySpecifier.location)', will fetch again.")
                 break quick