$ git clone -n https://src.fedoraproject.org/rpms/python-jaraco-functools.git /var/lib/mock/f39-build-1430269-31712/root/chroot_tmpdir/scmroot/python-jaraco-functools
Cloning into '/var/lib/mock/f39-build-1430269-31712/root/chroot_tmpdir/scmroot/python-jaraco-functools'...
$ git fetch origin 73e22ac98240b5543ebbfb378c2ec8287cb584e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jaraco-functools
 * [new ref]         73e22ac98240b5543ebbfb378c2ec8287cb584e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73e22ac update to 3.8.1 rhbz#2229532