$ git clone -n https://src.fedoraproject.org/rpms/python-pyngus.git /var/lib/mock/f41-build-757028-13423/root/chroot_tmpdir/scmroot/python-pyngus
Cloning into '/var/lib/mock/f41-build-757028-13423/root/chroot_tmpdir/scmroot/python-pyngus'...
$ git fetch origin 4ad9343c72801bb6ee0a27fc202477319826dafc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyngus
 * [new ref]         4ad9343c72801bb6ee0a27fc202477319826dafc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ad9343 Updates the version(revision)