$ git clone -n https://src.fedoraproject.org/rpms/rust-cxxbridge-flags.git /var/lib/mock/f40-build-2640579-66405/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags
Cloning into '/var/lib/mock/f40-build-2640579-66405/root/chroot_tmpdir/scmroot/rust-cxxbridge-flags'...
$ git fetch origin 010370a4c61108a3186c99a5b682487d1d05bb29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cxxbridge-flags
 * [new ref]         010370a4c61108a3186c99a5b682487d1d05bb29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 010370a Update to version 1.0.120 (rhbz#2271160)