$ git clone -n https://src.fedoraproject.org/rpms/rust-zopfli.git /var/lib/mock/f41-build-side-1-2924284-34985/root/chroot_tmpdir/scmroot/rust-zopfli
Cloning into '/var/lib/mock/f41-build-side-1-2924284-34985/root/chroot_tmpdir/scmroot/rust-zopfli'...
$ git fetch origin c07a3882436f2f38528b195175ffc221bf7ab0e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zopfli
 * [new ref]         c07a3882436f2f38528b195175ffc221bf7ab0e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c07a388 Allow proptest-derive 0.5.0