$ git clone -n https://src.fedoraproject.org/rpms/rust-crossbeam-queue.git /var/lib/mock/f45-build-41047-779/root/chroot_tmpdir/scmroot/rust-crossbeam-queue
Cloning into '/var/lib/mock/f45-build-41047-779/root/chroot_tmpdir/scmroot/rust-crossbeam-queue'...
$ git fetch origin 03a40ee9b72ea802a899777437ff22066ecf7825:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-crossbeam-queue
 * [new ref]         03a40ee9b72ea802a899777437ff22066ecf7825 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03a40ee Update to version 0.3.14; Fixes RHBZ#2529082