$ git clone -n https://src.fedoraproject.org/rpms/libunwind.git /var/lib/mock/f33-build-150908-43273/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/f33-build-150908-43273/root/chroot_tmpdir/scmroot/libunwind'...
$ git reset --hard ec928ec8df045c976347f400ad7918c4d4c6493d
HEAD is now at ec928ec backport change from upstream to fix reported test failures (bz1795896)