I am uploading a NMU to fix this.
The debdiff is attached.
diff -Nru ruby-ffi-libarchive-1.0.1/debian/changelog
ruby-ffi-libarchive-1.0.1/debian/changelog
--- ruby-ffi-libarchive-1.0.1/debian/changelog 2020-06-06 02:12:45.000000000
+0000
+++ ruby-ffi-libarchive-1.0.1/debian/changelog 2024-04-20 11:21:16.000000000
+0000
@@ -1,3 +1,10 @@
+ruby-ffi-libarchive (1.0.1-1.1) unstable; urgency=medium
+
+ * Non-maintainer upload (Closes: #1068538)
+ * d/watch: Scan with git mode
+
+ -- Bastian Germann <b...@debian.org> Sat, 20 Apr 2024 11:21:16 +0000
+
ruby-ffi-libarchive (1.0.1-1) unstable; urgency=medium
* Team upload.
diff -Nru ruby-ffi-libarchive-1.0.1/debian/watch
ruby-ffi-libarchive-1.0.1/debian/watch
--- ruby-ffi-libarchive-1.0.1/debian/watch 2020-06-06 02:12:45.000000000
+0000
+++ ruby-ffi-libarchive-1.0.1/debian/watch 2024-04-20 11:21:16.000000000
+0000
@@ -1,2 +1,3 @@
version=4
-https://github.com/chef/ffi-libarchive/releases .*/v(.*).tar.gz
+opts=mode=git \
+https://github.com/chef/ffi-libarchive.git refs/tags/v(\d\S*)
