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-rw-r--r--Documentation/git-prune.txt30
1 files changed, 29 insertions, 1 deletions
diff --git a/Documentation/git-prune.txt b/Documentation/git-prune.txt
index 3367c9b..05c8d49 100644
--- a/Documentation/git-prune.txt
+++ b/Documentation/git-prune.txt
@@ -8,7 +8,7 @@ git-prune - Prunes all unreachable objects from the object database
SYNOPSIS
--------
-'git-prune' [-n]
+'git-prune' [-n] [--] [<head>...]
DESCRIPTION
-----------
@@ -27,6 +27,34 @@ OPTIONS
Do not remove anything; just report what it would
remove.
+--::
+ Do not interpret any more arguments as options.
+
+<head>...::
+ Instead of keeping objects
+ reachable from any of our references, keep objects
+ reachable from only listed <head>s.
++
+Note that the explicitly named <head>s are *not* appended to the
+default set of references, but they replace them. In general you
+would want to say `git prune $(git-rev-parse --all) extra1
+extra2` to keep chains of commits leading to extra1, extra2,
+... in addition to what are reachable from your own refs.
+Saying `git prune extra1 extra2` would *lose* objects reachable
+only from the usual refs, which is usually not what you want.
+
+
+EXAMPLE
+-------
+
+To prune objects not used by your repository and another that
+borrows from your repository via its
+`.git/objects/info/alternates`:
+
+------------
+$ git prune $(git-rev-parse --all) \
+ $(cd ../another && $(git-rev-parse --all))
+------------
Author
------