$ git clone -n https://src.fedoraproject.org/rpms/rust-epoll.git /var/lib/mock/f40-build-2205526-52020/root/chroot_tmpdir/scmroot/rust-epoll
Cloning into '/var/lib/mock/f40-build-2205526-52020/root/chroot_tmpdir/scmroot/rust-epoll'...
$ git fetch origin 1e6a1ef09f2701cd44d6692f2dbdc761aaf1ae73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-epoll
 * [new ref]         1e6a1ef09f2701cd44d6692f2dbdc761aaf1ae73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e6a1ef Update to version 4.3.3