$ git clone -n https://src.fedoraproject.org/rpms/rust-cxx-build.git /var/lib/mock/f37-build-side-31-rust-devel-129803-7489/root/chroot_tmpdir/scmroot/rust-cxx-build
Cloning into '/var/lib/mock/f37-build-side-31-rust-devel-129803-7489/root/chroot_tmpdir/scmroot/rust-cxx-build'...
$ git reset --hard ff10189e56bd5cbe4bfc4acf757c3cce975b4463
HEAD is now at ff10189 Update to version 1.0.78; Fixes RHBZ#2128069