diff -r b1b3127227be -r 1c7f3d911d0f mercurial/hg.py
--- a/mercurial/hg.py	Fri Apr 09 17:04:39 2021 +0200
+++ b/mercurial/hg.py	Tue Jun 08 03:40:36 2021 +0200
@@ -825,7 +825,12 @@
             abspath = os.path.abspath(urlutil.urllocalpath(origsource))
 
         if islocal(dest):
-            cleandir = dest
+            if os.path.exists(dest):
+                # only clean up directories we create ourselves
+                hgdir = os.path.realpath(os.path.join(dest, b".hg"))
+                cleandir = hgdir
+            else:
+                cleandir = dest
 
         copy = False
         if (
@@ -855,9 +860,6 @@
             hgdir = os.path.realpath(os.path.join(dest, b".hg"))
             if not os.path.exists(dest):
                 util.makedirs(dest)
-            else:
-                # only clean up directories we create ourselves
-                cleandir = hgdir
             try:
                 destpath = hgdir
                 util.makedir(destpath, notindexed=True)