Update main.yml for Azure Pipelines

Author: dmitry-kurmanov

azure-pipelines/master/main.yml

@@ -86,6 +86,7 @@ jobs:
 
     steps:
       - checkout: self
+        clean: true
         persistCredentials: true
       - checkout: Service
         persistCredentials: true
@@ -330,6 +331,7 @@ jobs:
 
     steps:
       - checkout: self
+        clean: true
       - checkout: EmptyRepo
         persistCredentials: true
         clean: true
@@ -478,6 +480,7 @@ jobs:
 
     steps:
       - checkout: self
+        clean: true
       - checkout: EmptyRepo
         persistCredentials: true
         clean: true
@@ -637,6 +640,7 @@ jobs:
 
     steps:
       - checkout: self
+        clean: true
       - checkout: EmptyRepo
         persistCredentials: true
         clean: true
@@ -796,6 +800,7 @@ jobs:
 
     steps:
       - checkout: self
+        clean: true
       - checkout: EmptyRepo
         persistCredentials: true
         clean: true