$ git clone -n https://src.fedoraproject.org/rpms/python-jaraco-functools.git /var/lib/mock/f45-build-31162-650/root/chroot_tmpdir/scmroot/python-jaraco-functools
Cloning into '/var/lib/mock/f45-build-31162-650/root/chroot_tmpdir/scmroot/python-jaraco-functools'...
$ git fetch origin f68d86c9d5fa8307d58f714d07dbd0131e7d89f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jaraco-functools
 * [new ref]         f68d86c9d5fa8307d58f714d07dbd0131e7d89f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f68d86c updating to 4.6.0 rhbz#2499880