$ git clone -n https://src.fedoraproject.org/rpms/lldb.git /var/lib/mock/f40-build-1572367-24016/root/chroot_tmpdir/scmroot/lldb
Cloning into '/var/lib/mock/f40-build-1572367-24016/root/chroot_tmpdir/scmroot/lldb'...
$ git fetch origin 2f8827e442767669ccffd2577e60563e31287ff4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lldb
 * [new ref]         2f8827e442767669ccffd2577e60563e31287ff4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f8827e 18.1.6 Release