$ git clone -n https://src.fedoraproject.org/rpms/rust-event-listener2.git /var/lib/mock/f38-build-side-43-rust-devel-1421128-31465/root/chroot_tmpdir/scmroot/rust-event-listener2
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1421128-31465/root/chroot_tmpdir/scmroot/rust-event-listener2'...
$ git fetch origin b437741643a4b6a59791dcce7712f1433bd05374:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-event-listener2
 * [new ref]         b437741643a4b6a59791dcce7712f1433bd05374 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b437741 Added the README