Fix git checkout

TCC/conanfile.py

@@ -1,5 +1,6 @@
 from conans import ConanFile, AutoToolsBuildEnvironment, tools
 import os
+import shutil
 
 class TccConan(ConanFile):
     name = "tcc"
@@ -19,11 +20,12 @@ class TccConan(ConanFile):
     exports_sources = "tcc-%s/*" % version
 
     def source(self):
-        if self.revsion:
+        if self.revision:
+            self.output.info("Cloning from %s" % self.git_repo)
             git = tools.Git(folder=self.sub_folder)
-            if not os.path.exists(self.sub_folder):
+            if os.path.exists(self.sub_folder):
+                shutil.rmtree(self.sub_folder) 
             git.clone(self.git_repo)
-                git.pull()
             git.checkout(self.revision)
         else:
             self.output.info("Downloading %s" % self.source_tar)