$ git clone -n https://src.fedoraproject.org/rpms/libcxx.git /var/lib/mock/f41-build-845738-162770/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/f41-build-845738-162770/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 77fdf22cdf92aa150e5b72b7b7b8e1b22a381521
HEAD is now at 77fdf22 Migrate llvm-libunwind-doc to SPDX license