$ git clone -n https://src.fedoraproject.org/rpms/rust-docopt.git /var/lib/mock/f38-build-719379-96986/root/chroot_tmpdir/scmroot/rust-docopt
Cloning into '/var/lib/mock/f38-build-719379-96986/root/chroot_tmpdir/scmroot/rust-docopt'...
$ git fetch origin 5bba119919d90c232f318d6e9628f75e162bd921:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-docopt
 * [new ref]         5bba119919d90c232f318d6e9628f75e162bd921 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bba119 Regenerate with rust2rpm v24 and update license tag