$ git clone -n https://src.fedoraproject.org/rpms/libxdiff.git /var/lib/mock/f39-build-1879224-42749/root/chroot_tmpdir/scmroot/libxdiff
Cloning into '/var/lib/mock/f39-build-1879224-42749/root/chroot_tmpdir/scmroot/libxdiff'...
$ git fetch origin 79316e862f8df572a93f7441bccc4810f198b31a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxdiff
 * [new ref]         79316e862f8df572a93f7441bccc4810f198b31a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79316e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild