$ git clone -n https://src.fedoraproject.org/rpms/python-nilearn.git /var/lib/mock/f41-build-1024372-18205/root/chroot_tmpdir/scmroot/python-nilearn
Cloning into '/var/lib/mock/f41-build-1024372-18205/root/chroot_tmpdir/scmroot/python-nilearn'...
$ git fetch origin c23ebf74a58b412bbbb1cbe625eb514777d2b062:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nilearn
 * [new ref]         c23ebf74a58b412bbbb1cbe625eb514777d2b062 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c23ebf7 F40+: Drop spec-file conditionals for 32-bit architectures