$ git clone -n https://src.fedoraproject.org/rpms/rust-cxxbridge-flags.git /var/lib/mock/f40-build-2711927-71916/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags
Cloning into '/var/lib/mock/f40-build-2711927-71916/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags'...
$ git fetch origin 870c4bab02e36d2742889598f3dac3548a7080f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cxxbridge-flags
 * [new ref]         870c4bab02e36d2742889598f3dac3548a7080f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 870c4ba Update to version 1.0.121 (rhbz#2274053)