diff --git a/rust/hg-core/src/revset.rs b/rust/hg-core/src/revset.rs
--- a/rust/hg-core/src/revset.rs
+++ b/rust/hg-core/src/revset.rs
@@ -20,6 +20,10 @@
     let changelog = Changelog::open(repo)?;
 
     match input {
+        "." => {
+            let p1 = repo.dirstate_parents()?.p1;
+            return Ok(changelog.revlog.get_node_rev(p1.into())?)
+        }
         "null" => return Ok(NULL_REVISION),
         _ => {
             match resolve_rev_number_or_hex_prefix(input, &changelog.revlog) {