$ git clone -n https://src.fedoraproject.org/rpms/rust-rustyline.git /var/lib/mock/f40-build-2123629-50762/root/chroot_tmpdir/scmroot/rust-rustyline
Cloning into '/var/lib/mock/f40-build-2123629-50762/root/chroot_tmpdir/scmroot/rust-rustyline'...
$ git fetch origin f2dd0b578c6deefc86e8dc67b31ad527f6fbc76b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustyline
 * [new ref]         f2dd0b578c6deefc86e8dc67b31ad527f6fbc76b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2dd0b5 Skip a test for exact struct size that fails on 32-bit architectures