$ git clone -n https://src.fedoraproject.org/rpms/rust-memcached-rs.git /var/lib/mock/f40-build-2073183-49350/root/chroot_tmpdir/scmroot/rust-memcached-rs
Cloning into '/var/lib/mock/f40-build-2073183-49350/root/chroot_tmpdir/scmroot/rust-memcached-rs'...
$ git fetch origin 0741a2903c76b54c420ba2a92aa7d44f25cbded8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memcached-rs
 * [new ref]         0741a2903c76b54c420ba2a92aa7d44f25cbded8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0741a29 Regenerate with rust2rpm v24