$ git clone -n https://src.fedoraproject.org/rpms/rust-cxxbridge-flags.git /var/lib/mock/f39-build-2218719-52624/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags
Cloning into '/var/lib/mock/f39-build-2218719-52624/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags'...
$ git fetch origin a9e6de73eaf64aa9c4105b2830e63fb9e4b522cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cxxbridge-flags
 * [new ref]         a9e6de73eaf64aa9c4105b2830e63fb9e4b522cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9e6de7 Update to version 1.0.115 (rhbz#2257013)