$ git clone -n https://src.fedoraproject.org/rpms/zlib-ng.git /var/lib/mock/f41-build-807990-145577/root/chroot_tmpdir/scmroot/zlib-ng
Cloning into '/var/lib/mock/f41-build-807990-145577/root/chroot_tmpdir/scmroot/zlib-ng'...
$ git fetch origin 3e4241ca5d57b2fdbdaf389c9cb70de37e7fe58a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zlib-ng
 * [new ref]         3e4241ca5d57b2fdbdaf389c9cb70de37e7fe58a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e4241c Fix illegal instruction usage in Xeon Phi x200 processors