$ git clone -n https://src.fedoraproject.org/rpms/dwz.git /var/lib/mock/f41-build-side-1-2817293-32985/root/chroot_tmpdir/scmroot/dwz
Cloning into '/var/lib/mock/f41-build-side-1-2817293-32985/root/chroot_tmpdir/scmroot/dwz'...
$ git fetch origin a16ef648754f1ebd75a227dfbeb6db0c266cce50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dwz
 * [new ref]         a16ef648754f1ebd75a227dfbeb6db0c266cce50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a16ef64 Fix build with GDB 15