fix: rename prune config

README.md

@@ -30,12 +30,14 @@ named `mydropbox`, the URL `rclone://mydropbox/myrepository` identifies a remote
 in a directory `myrepository/` under this DropBox account.
 
 ## Configuration
+
 `git-remote-rclone` can be configured to get git to prune the repo aggressively before
-uploading via rclone. This comes in handy to minimize the uploaded file size. To
-configure it, run this in your git repo:
+uploading via rclone. This comes in handy to minimize the uploaded file size, at the
+cost of the time taken to prune. This is a good tradeoff for low-bandwidth situations.
+To configure it, run this in your git repo:
 
 ```
-git config --add gitremoterclone.prunefirst "true"
+git config --add git-remote-rclone.pruneaggressively "true"
 ```
 
 ## Example

git-remote-rclone

@@ -208,14 +208,14 @@ class RCloneRemote(object):
 
     def gitgc(self):
         """Prune aggressively if configured via:
-             git config --add gitremoterclone.prunefirst "true"
+             git config --add git-remote-rclone.pruneaggressively "true"
         """
         env_orig = os.environ.copy()
         env_orig['GIT_DIR'] = str(self.gitdir)
         env = os.environ.copy()
         env['GIT_DIR'] = str(self.repodir)
 
-        prune = self.run_cmd(['git', 'config', 'gitremoterclone.prunefirst'],
+        prune = self.run_cmd(['git', 'config', 'git-remote-rclone.pruneaggressively'],
                              env=env_orig, check=False).strip().lower()
         self.log(f"Prune is: {prune}")
         gc_cmd = ['git', 'gc']