$ git clone -n https://src.fedoraproject.org/rpms/python-rnc2rng.git /var/lib/mock/f45-build-32792-662/root/chroot_tmpdir/scmroot/python-rnc2rng
Cloning into '/var/lib/mock/f45-build-32792-662/root/chroot_tmpdir/scmroot/python-rnc2rng'...
$ git fetch origin 0b26c06ad64b2d247a626ed39be13bfb197ff2d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-rnc2rng
 * [new ref]         0b26c06ad64b2d247a626ed39be13bfb197ff2d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b26c06 Simplify .gitignore