$ git clone -n https://src.fedoraproject.org/rpms/python-y-py.git /var/lib/mock/f40-build-2618243-64498/root/chroot_tmpdir/scmroot/python-y-py
Cloning into '/var/lib/mock/f40-build-2618243-64498/root/chroot_tmpdir/scmroot/python-y-py'...
$ git fetch origin 195aba6d86ba60e5eaecc44a3c956e621999d14a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-y-py
 * [new ref]         195aba6d86ba60e5eaecc44a3c956e621999d14a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 195aba6 Orphaned for 6+ weeks