$ git clone -n https://src.fedoraproject.org/rpms/rust-cxx-gen.git /var/lib/mock/f37-build-side-31-rust-devel-102578-5581/root/chroot_tmpdir/scmroot/rust-cxx-gen
Cloning into '/var/lib/mock/f37-build-side-31-rust-devel-102578-5581/root/chroot_tmpdir/scmroot/rust-cxx-gen'...
$ git reset --hard 513c7f31ea6238b541ccbe2f157f3b19d18acfd4
HEAD is now at 513c7f3 Update to version 0.7.85; Fixes RHBZ#2154563