$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_more.git /var/lib/mock/f42-build-side-1-3588918-46951/root/chroot_tmpdir/scmroot/rust-derive_more
Cloning into '/var/lib/mock/f42-build-side-1-3588918-46951/root/chroot_tmpdir/scmroot/rust-derive_more'...
$ git fetch origin cf732b5dc1a8d6718ab5ca71ffc29266efbd2661:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_more
 * [new ref]         cf732b5dc1a8d6718ab5ca71ffc29266efbd2661 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf732b5 Skip three tests that fail on big-endian architectures