$ git clone -n https://src.fedoraproject.org/rpms/python-scikit-learn.git /var/lib/mock/f45-build-32875-664/root/chroot_tmpdir/scmroot/python-scikit-learn
Cloning into '/var/lib/mock/f45-build-32875-664/root/chroot_tmpdir/scmroot/python-scikit-learn'...
$ git fetch origin 3cd20f4ccffdfbd74b921aabd4ed429924da3554:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-scikit-learn
 * [new ref]         3cd20f4ccffdfbd74b921aabd4ed429924da3554 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cd20f4 Disable loky tests for the moment