$ git clone -n https://src.fedoraproject.org/rpms/rust-cxxbridge-flags.git /var/lib/mock/f45-build-41130-779/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags
Cloning into '/var/lib/mock/f45-build-41130-779/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags'...
$ git fetch origin 7e9c776ca5c3286ea16d1a0213a90ca46b9eb3dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cxxbridge-flags
 * [new ref]         7e9c776ca5c3286ea16d1a0213a90ca46b9eb3dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e9c776 Update to version 1.0.200; Fixes RHBZ#2528931